Adds generator support for Xcode 5 xctest targets.

test/mac/xctest/App/Classes/Shared+Category.h

Index: test/mac/xctest/App/Classes/Shared+Category.h
diff --git a/test/prune_targets/lib1.cc b/test/mac/xctest/App/Classes/Shared+Category.h
similarity index 64%
copy from test/prune_targets/lib1.cc
copy to test/mac/xctest/App/Classes/Shared+Category.h
index 692b7de6d82c927503c21607863f671307fa6cd1..8bdac5fb8bd3b8ebc5fdcd8da666d711ca4ddf3d 100644
--- a/test/prune_targets/lib1.cc
+++ b/test/mac/xctest/App/Classes/Shared+Category.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 libfunc1() {
-}
+@interface Shared (Category)
+- (NSString *)sharedCategoryMethod;
+@end