Adds generator support for Xcode 5 xctest targets.

test/mac/xctest/TestSupport/TestSupport.m

Index: test/mac/xctest/TestSupport/TestSupport.m
diff --git a/test/mac/xctest/TestSupport/TestSupport.m b/test/mac/xctest/TestSupport/TestSupport.m
new file mode 100644
index 0000000000000000000000000000000000000000..9967959211ee5f01576b9ef6e25d642aae09ee10
--- /dev/null
+++ b/test/mac/xctest/TestSupport/TestSupport.m
@@ -0,0 +1,12 @@
+// 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 "TestSupport.h"
+#import "Shared.h"
+
+@implementation TestSupport
+- (void)setUp {
+  Shared *foo = [[Shared alloc] init];
+  NSLog(@"Setting up test support. (%@)", foo);
+}
+@end