Revert "Resolve MMX register allocation."

This reverts commit c35d07f7ae831aa51f1d4986e8a21cd2454219c1.
Disable MMX (-fomit-frame-pointer)
-fomit-frame-pointer workaround.
Merge branch 'joyent/feature/miscfix/2013Q4' into joyent/release/2013Q4