Qt buildfix.
Merge pull request #2093 from xsacha/armjit-vfpu

Armjit: Improve ApplyPrefixD. Add VABD to emitter.
CMake and Meego buildfix.
Check magic number to reject SFO files specifically from being loaded as modules. Should fix the strange Soul Calibur issue in issue #2063.
Attempt at combining mul.s + (neg.s/add.s/sub.s)