vtpm/vtpmmgr and required libs to stubdom/Makefile

vtpm/vtpmmgr and required libs to stubdom/Makefile

Add 3 new libraries to stubdom:
libgmp
polarssl
Berlios TPM Emulator 0.7.4

Add makefile structure for vtpm and vtpmmgrdom. Both
vtpm domains are optional builds as vtpm depends on
cmake. To build either of them, you must do so explicitly.
make vtpm-stubdom vtpmmgrdom

Finally, also update .*ignore

Signed-off-by: Matthew Fioravante <matthew.fioravante@jhuapl.edu>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
[ijc, folded in fix from Matthew to workaround cmake 2.8.2 build failure]
Committed-by: Ian Campbell <ian.campbell@citrix.com>