Implement left/right load/store, clz/clo, and vmone/vmzero/vmidt in x86 jit

For the load/stores, I feel like there ought to be a simpler way, and on 32-bit it's barely better than interpreter (it has to use like half the regs...)  At least this way does work, and it seems to gain a small bit of speed over the interpreter.  It doesn't result in a tiny amount of code, especially when fastmem is off...

The others are relatively straight forward.  Yeah, I realize x86 doesn't really *need* to be faster.

Anyway, this gives a 3-4% improvement in Senjou no Valkyria 3.

-[Unknown]