Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/mac/gyptest-ldflags.py

Index: test/mac/gyptest-ldflags.py
diff --git a/test/mac/gyptest-ldflags.py b/test/mac/gyptest-ldflags.py
index 4da40490d3bf8d7f2ebb438cfae543140e0dcba3..af44b8c5a056a2ef8dce99a9c26096da4f4e16e5 100644
--- a/test/mac/gyptest-ldflags.py
+++ b/test/mac/gyptest-ldflags.py
@@ -16,6 +16,12 @@ 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()
+
   CHDIR = 'ldflags'
   test.run_gyp('subdirectory/test.gyp', chdir=CHDIR)