[X86] Add guards to some of the x86 intrinsic tests to skip 64-bit mode only...

[X86] Add guards to some of the x86 intrinsic tests to skip 64-bit mode only intrinsics when compiled for 32-bit mode.

All the command lines are for 64-bit mode, but sometimes I compile
the tests in 32-bit mode to see what assembly we get and we need
to skip these to do that.

llvm-svn: 365668