Add "standalone_static_library" target flag

test/configurations/invalid/gyptest-configurations.py

 #!/usr/bin/env python
 
 # Copyright (c) 2010 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 build of an executable in three different configurations.
 """
 
 import TestGyp
 
 # Keys that do not belong inside a configuration dictionary.
 invalid_configuration_keys = [
   'actions',
   'all_dependent_settings',
   'configurations',
   'dependencies',
   'direct_dependent_settings',
   'libraries',
   'link_settings',
   'sources',
+  'standalone_static_library',
   'target_name',
   'type',
 ]
 
 test = TestGyp.TestGyp()
 
 if test.format == 'scons':
   test.skip_test('TODO: http://code.google.com/p/gyp/issues/detail?id=176\n')
 
 for test_key in invalid_configuration_keys:
   test.run_gyp('%s.gyp' % test_key, status=1, stderr=None)
   expect = ['%s not allowed in the Debug configuration, found in target '
             '%s.gyp:configurations#target' % (test_key, test_key)]
   test.must_contain_all_lines(test.stderr(), expect)
 
 test.pass_test()