Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/mac/gyptest-sourceless-module.py

Index: test/mac/gyptest-sourceless-module.py
diff --git a/test/mac/gyptest-sourceless-module.py b/test/mac/gyptest-sourceless-module.py
index b56b75ed4f2831e5fd31086573feafab4b2074bb..70a2c9e1606f03f5eea7c19ead47bce8a29fcc6e 100644
--- a/test/mac/gyptest-sourceless-module.py
+++ b/test/mac/gyptest-sourceless-module.py
@@ -15,7 +15,9 @@ import sys
 if sys.platform == 'darwin':
   test = TestGyp.TestGyp(formats=['ninja', 'make', 'xcode'])
 
-  test.run_gyp('test.gyp', chdir='sourceless-module')
+  test.run_gyp('test.gyp',
+               '-G', 'xcode_ninja_target_pattern=^.*$',
+               chdir='sourceless-module')
 
   # Just needs to build without errors.
   test.build('test.gyp', 'empty_bundle', chdir='sourceless-module')