Adds generator support for Xcode 5 xctest targets.

test/mac/xctest/TestSupport/TestSupport.h

Index: test/mac/xctest/TestSupport/TestSupport.h
diff --git a/test/prune_targets/lib3.cc b/test/mac/xctest/TestSupport/TestSupport.h
similarity index 68%
copy from test/prune_targets/lib3.cc
copy to test/mac/xctest/TestSupport/TestSupport.h
index af0f717b020e5bebb15a650338520ff2bc9becf9..1a9f5e7dcde40c9f6b095ad437aed1b28f2c0aa5 100644
--- a/test/prune_targets/lib3.cc
+++ b/test/mac/xctest/TestSupport/TestSupport.h
@@ -1,6 +1,8 @@
 // Copyright (c) 2013 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.
+#import "Shared.h"
 
-void libfunc3() {
-}
+@interface TestSupport : NSObject
+- (void)setUp;
+@end