JIT64: try enabling dcbz again

This time, check the address carefully beforehand, since apparently some games
do horrible things like running it on non-RAM addresses, or at the very least
virtual addresses.
Removed the auto setting of SEQUENCE_MS because the synchronised audio code has made it unnecessary.
Merge pull request #940 from delroth/x64emittertest

Add unit tests for the x64Emitter
Merge pull request #904 from FioraAeterna/dcbz

JIT64: try enabling dcbz again
Merge pull request #930 from skidau/openal-seq-ms

Removed the auto setting of SEQUENCE_MS because the synchronised audio c...
Add some static_asserts to the Arm32 JIT to make sure ppcState is sane.
Merge pull request #943 from Sonicadvance1/arm32-asserts

Add some static_asserts to the Arm32 JIT to make sure ppcState is sane.
x64EmitterTest: Fake support for all CPU extensions