debian: split debug files out of xen-hypervisor-V-F and xen-utils-V
The debug files have grown in size over time and can no longer be
considered small. So we now ship them uncompressed in new -dbg
packages.
The files are installed into /usr/lib/debug at the same path as the
binaries they correspond to, as described in the "Best practices for
debug packages" (Section 6.8.9) in the Debian Developer's Reference.
Signed-off-by: Maximilian Engelhardt <maxi@daemonizer.de>