Implement vscl in the x86 jit.
Non-optimal vmmul for x86 jit.

It's faster than interpreter anyway, but it could be much better.
Initial / simple vmscl for x86 jit.
Initial x86 jit for vtfm/vhtfm.
Merge pull request #1367 from unknownbrackets/jit-vfpu

Initial vscl, vmmul, vmscl, and v(h)tfm in x86 jit