MdePkg BaseLib X64: Tag MSFT/INTEL for .asm routines in GccInline.c

MdePkg BaseLib X64: Tag MSFT/INTEL for .asm routines in GccInline.c

Once the MASM code is converted to NASM, it will be linked into GCC
builds. Since GccInline.c provides these routines for GCC, we need to
prevent this linking.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>