ART: Update and correct assemble_x86.cc

Correct the definition of some X86 instructions in the file.
Add some new instructions and the code to emit them properly.

Added EmitMemCond()

Change-Id: Icf4b70236cf0ca857c85dcb3edb218f26be458eb
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>
3 files changed