Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/mac/gyptest-loadable-module-bundle-product-extension.py

 #!/usr/bin/env python
 
 # Copyright (c) 2014 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.
 
 """
 Tests that loadable_modules don't collide when using the same name with
 different file extensions.
 """
 
 import TestGyp
 
 import os
 import struct
 import sys
 
 if sys.platform == 'darwin':
   test = TestGyp.TestGyp(formats=['ninja', 'make', 'xcode'])
 
+  # The xcode-ninja generator fails because it doesn't copy the extension
+  # cf. https://code.google.com/p/gyp/issues/detail?id=450
+  if test.format == 'xcode-ninja':
+    test.skip_test()
+
   CHDIR = 'loadable-module-bundle-product-extension'
   test.run_gyp('test.gyp', chdir=CHDIR)
   test.build('test.gyp', test.ALL, chdir=CHDIR)
 
   test.must_exist(test.built_file_path('Collide.foo', chdir=CHDIR))
   test.must_exist(test.built_file_path('Collide.bar', chdir=CHDIR))
 
   test.pass_test()