VEX-side support for the V-bit tester.
- recognise the new "special instruction" for all architectures
  (ARM needs implementation work; x86 and ARM are untested)
- inject IR into the superblock
- type definition for the IR injection control block


git-svn-id: svn://svn.valgrind.org/vex/trunk@2490 8f6e269a-dfd6-0310-a8e1-e2731360e62c
9 files changed