[NaCl SDK] Update build_sdk.py to display Cr-Commit-Position in README.

native_client_sdk/src/tools/tests/getos_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import shutil
 import sys
 import tempfile
 import unittest
@@ skipping 99 matching lines @@
     self.patch = mock.patch.dict('os.environ',
                                   {'NACL_SDK_ROOT': self.tempdir})
     self.patch.start()
 
   def tearDown(self):
     shutil.rmtree(self.tempdir)
     self.patch.stop()
 
   def testGetSDKVersion(self):
     """correctly parses README to find SDK version."""
-    expected_version = (16, '196')
+    expected_version = (16, '196', 'f00baacabba6e-refs/heads/master@{#100}')
     with open(os.path.join(self.tempdir, 'README'), 'w') as out:
       out.write('Version: %s\n' % expected_version[0])
       out.write('Chrome Revision: %s\n' % expected_version[1])
+      out.write('Chrome Commit Position: %s\n' % expected_version[2])
 
     version = getos.GetSDKVersion()
     self.assertEqual(version, expected_version)
 
 
 if __name__ == '__main__':
   unittest.main()