Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/mac/gyptest-installname.py

Index: test/mac/gyptest-installname.py
diff --git a/test/mac/gyptest-installname.py b/test/mac/gyptest-installname.py
index c300820f6ceff1295c6f6bdd7b9025dbb496baad..764493c4883617547d1679b15b82ec2bbb542c52 100644
--- a/test/mac/gyptest-installname.py
+++ b/test/mac/gyptest-installname.py
@@ -19,7 +19,10 @@ if sys.platform == 'darwin':
   test = TestGyp.TestGyp(formats=['ninja', 'make', 'xcode'])
 
   CHDIR = 'installname'
-  test.run_gyp('test.gyp', chdir=CHDIR)
+  test.run_gyp('test.gyp',
+               '-G', 'xcode_ninja_target_pattern=^.*$',
+               chdir=CHDIR)
+
   test.build('test.gyp', test.ALL, chdir=CHDIR)
 
   def GetInstallname(p):