define __va_copy unconditionally, but va_copy only in c99 or non-ansi mode.
Fixes rdar://6759546, some code that actually used __va_copy because they
thought it was "more portable".


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68503 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed