Removed GLOBAL_REMOVE_IF_UNREFERENCED for patchable PCD because it will cause that patchable PCD variables information won't be in the map file generated by linker.
Removed GLOBAL_REMOVE_IF_UNREFERENCED for patchable PCD because it will cause that patchable PCD variables information won't be in the map file generated by linker.

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@6617 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2