[X86] Add VEX_LIG to scalar VEX/EVEX instructions that were missing it.

Scalar VEX/EVEX instructions don't use the L bit and don't look at it for decoding either.
So we should ignore it in our disassembler.

The missing instructions here were found by grepping the raw tablegen class definitions in
the tablegen debug output.

llvm-svn: 358040