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

native_client_sdk/src/build_tools/build_sdk.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.
 
 """Entry point for both build and try bots.
 
 This script is invoked from XXX, usually without arguments
 to package an SDK. It automatically determines whether
 this SDK is for mac, win, linux.
@@ skipping 164 matching lines @@
 
 def BuildStepCopyTextFiles(pepperdir, pepper_ver, chrome_revision,
                            nacl_revision):
   buildbot_common.BuildStep('Add Text Files')
   InstallFiles(SDK_SRC_DIR, pepperdir, TEXT_FILES)
 
   # Replace a few placeholders in README
   readme_text = open(os.path.join(SDK_SRC_DIR, 'README')).read()
   readme_text = readme_text.replace('${VERSION}', pepper_ver)
   readme_text = readme_text.replace('${CHROME_REVISION}', chrome_revision)
+  readme_text = readme_text.replace('${CHROME_COMMIT_POSITION}',
+                                    build_version.ChromeCommitPosition())
   readme_text = readme_text.replace('${NACL_REVISION}', nacl_revision)
 
   # Year/Month/Day Hour:Minute:Second
   time_format = '%Y/%m/%d %H:%M:%S'
   readme_text = readme_text.replace('${DATE}',
       datetime.datetime.now().strftime(time_format))
 
   open(os.path.join(pepperdir, 'README'), 'w').write(readme_text)
 
 
@@ skipping 834 matching lines @@
     BuildStepArchiveSDKTools()
 
   return 0
 
 
 if __name__ == '__main__':
   try:
     sys.exit(main(sys.argv))
   except KeyboardInterrupt:
     buildbot_common.ErrorExit('build_sdk: interrupted')