Update GCC version of VAR_ARG () to be compatible with non GCC version of VAR_ARG () so it handles TYPE parameters that are smaller than UINTN properly when GCC builtins are used for vararg parsing.
Update GCC version of VAR_ARG () to be compatible with non GCC version of VAR_ARG () so it handles TYPE parameters that are smaller than UINTN properly when GCC builtins are used for vararg parsing.


git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@8282 6f19259b-4bc3-4df7-8a09-765794883524

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