tools/libs: Simplify internal *.pc files

tools/libs: Simplify internal *.pc files

The internal package config file for libxenlight reads (reformatted to avoid
exceeding the SMTP 998-character line length):

  Libs: -L${libdir}
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/evtchn
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/call
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/evtchn
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/gnttab
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/foreignmemory
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/call
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/devicemodel
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/ctrl
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/store
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/call
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/hypfs
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/evtchn
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/call
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/evtchn
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/gnttab
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/foreignmemory
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/call
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/devicemodel
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/ctrl
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/guest
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/light
  -lxenlight

Drop duplicate -rpath-link='s to turn it into the slightly-more-manageable:

  Libs: -L${libdir}
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/call
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/ctrl
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/devicemodel
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/evtchn
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/foreignmemory
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/gnttab
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/guest
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/hypfs
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/light
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/store
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toolcore
  -Wl,-rpath-link=/local/security/xen.git/tools/libs/light/../../../tools/libs/toollog
  -lxenlight

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>