x64Emitter: fix bitwise AVX opcodes

The reason this didn't break is that bitwise instructions like VPAND,
VANDPS, and VANDPD do the exact same thing. The only difference is the
data type they are intended for.
UnitTests: fix register symbol name in AVX tests
UnitTests: add tests for bitwise AVX instructions
Merge pull request #1660 from Tilka/avx_bitwise

Fix opcodes of AVX bitwise instructions