Add support for the lbarx, lharx, stbcx and sthcs instructions.

The instructions are part of the ISA 2.06 but were not implemented
in all versions of hardware.  The four instructions are all supported
in ISA 2.07.  The instructions were put under the ISA 2.07 category
of supported instructions in this patch.

The VEX commit for this fix is r3137.

The bugzilla for this issue is 346324.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15106 a5019735-40e9-0310-863c-91ae7b9d1cf9
7 files changed