Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/mac/gyptest-libraries.py

Index: test/mac/gyptest-libraries.py
diff --git a/test/mac/gyptest-libraries.py b/test/mac/gyptest-libraries.py
index 46814d65afc42e8131033067b5a37b3a71ee1507..d5b64bda7f4b5cb1e60eaf7b255501c391cea880 100755
--- a/test/mac/gyptest-libraries.py
+++ b/test/mac/gyptest-libraries.py
@@ -15,6 +15,12 @@ import sys
 if sys.platform == 'darwin':
   test = TestGyp.TestGyp(formats=['ninja', 'make', 'xcode'])
 
+  # The xcode-ninja generator handles gypfiles which are not at the
+  # project root incorrectly.
+  # cf. https://code.google.com/p/gyp/issues/detail?id=460
+  if test.format == 'xcode-ninja':
+    test.skip_test()
+
   test.run_gyp('subdir/test.gyp', chdir='libraries')
 
   test.build('subdir/test.gyp', test.ALL, chdir='libraries')