Add ISA 2.07 vbit test support

Add ISA 2.07 vbit test support

The ISA 2.07 support adds new Iops as well as support for some existing
Iops.  None of these Iops have been enabled in the vbit tester.  This commit
adds the needed support to the files VEX/priv/ir_inject and VEX/pub/libvex.h.
These changes add support for additional immediate operands.

There are additional changes to the memcheck files to complete the ISA 2.07
support.

Bugzilla 354797 was created for this issue.

git-svn-id: svn://svn.valgrind.org/vex/trunk@3202