move vtpmmgr helpers from tools to stubdom

move vtpmmgr helpers from tools to stubdom

Tools.mk contains a dead CONFIG_VTPM, @vtpm@ is never expanded because
@vtpm@ is only known by stubdom/configure.ac. Move the two perl scripts
to stubdom/vtpmmgr and install them as executeable. This was introduced
by the recent commit ffa11862aa431494e809c6e99f7358c12cb67e44 ("vtpmmgr:
add example control tools")
Also remove vtpm= from config/Stubdom.mk because vtpm= is (appearently)
not used by make itself.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>