Made use of GCC built-in functions for variable arguments in procedures dependent on NO_BUILTIN_VA_FUNCS.  This is because they do not function correctly in GCC 4.4 when using ms_abi in X64 images.  This does not change functionality for other projects.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10440 6f19259b-4bc3-4df7-8a09-765794883524
1 file changed