Add support for GCC_WARN_ABOUT_INVALID_OFFSETOF_MACRO to xcode emulation.

test/mac/xcode-gcc/warn_about_missing_newline.c

Index: test/mac/xcode-gcc/warn_about_missing_newline.c
===================================================================
--- test/mac/xcode-gcc/warn_about_missing_newline.c	(revision 0)
+++ test/mac/xcode-gcc/warn_about_missing_newline.c	(revision 0)
@@ -0,0 +1,8 @@
+// Copyright (c) 2012 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Important: Don't terminate this file with a newline.
+int main() {
+  return 0;
+}
Property changes on: test/mac/xcode-gcc/warn_about_missing_newline.c
___________________________________________________________________
Added: svn:eol-style
   + LF