Change the QGR union over to a BitField union.
Makes it easier to generate a QGR in my unit test, cleaner overall of course.
Change fres/frsqrte jumps
Add a fake SContext definition for _M_GENERIC.
Fix warning in x64CPUDetect.cpp in generic build by not building it.
Merge pull request #1151 from comex/generic-build-fixes

Fixes for _M_GENERIC build
Merge pull request #1125 from Sintendo/fresjumps

Change fres/frsqrte jumps
JIT: fix bugs with ComputeRC in branch merging patch

We really, really need to be sure the input to ComputeRC is a register.
Merge pull request #1162 from FioraAeterna/fixmerges

JIT: fix bugs with ComputeRC in branch merging patch
Merge pull request #1127 from Sonicadvance1/QGR-BitField

Change the QGR union over to a BitField union.