Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/prune_targets/gyptest-prune-targets.py

 #!/usr/bin/env python
 
 # Copyright (c) 2013 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.
 
 """
 Verifies --root-target removes the unnecessary targets.
 """
 
 import TestGyp
 
 test = TestGyp.TestGyp()
+# The xcode-ninja generator has its own logic for which targets to include
+if test.format == 'xcode-ninja':
+  test.skip_test()
 
 build_error_code = {
   'android': 2,
   'cmake': 1,
   'make': 2,
   'msvs': 1,
   'ninja': 1,
   'xcode': 65,
 }[test.format]
 
@@ skipping 31 matching lines @@
 test.run_gyp('test1.gyp', '--root-target=program1', '--root-target=program2')
 test.build('test2.gyp', 'lib1')
 test.build('test2.gyp', 'lib2')
 test.build('test2.gyp', 'lib3', status=build_error_code, stderr=None)
 test.build('test2.gyp', 'lib_indirect')
 test.build('test1.gyp', 'program1')
 test.build('test1.gyp', 'program2')
 test.build('test1.gyp', 'program3', status=build_error_code, stderr=None)
 
 test.pass_test()