Add an AOSP builder recipe.

scripts/slave/annotated_run.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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 fully-annotated builds.
 
 This script is part of the effort to move all builds to annotator-based
 systems. Any builder configured to use the AnnotatorFactory.BaseFactory()
 found in scripts/master/factory/annotator_factory.py executes a single
@@ skipping 180 matching lines @@
     build_properties_str = json.dumps(opts.build_properties)
     property_placeholder_lst = [
         '--factory-properties', factory_properties_str,
         '--build-properties', build_properties_str]
     for step in steps:
       new_cmd = []
       for item in expand_root_placeholder(root, step['cmd']):
         if item == recipe_util.PropertyPlaceholder:
           new_cmd.extend(property_placeholder_lst)
         else:
-          new_cmd.append(item)
+          new_cmd.append(str(item))
       step['cmd'] = new_cmd
       if 'cwd' in step:
         [new_cwd] = expand_root_placeholder(root, [step['cwd']])
         step['cwd'] = new_cwd
     annotator_path = os.path.join(
       os.path.dirname(SCRIPT_PATH), 'common', 'annotator.py')
     tmpfile, tmpname = tempfile.mkstemp()
     try:
       cmd = [sys.executable, annotator_path, tmpname]
       step_doc = json.dumps(steps)
@@ skipping 29 matching lines @@
       s.step_text('gclient sync failed!')
       s.step_warnings()
     os.environ['RUN_SLAVE_UPDATED_SCRIPTS'] = '1'
     return True
 
 
 if __name__ == '__main__':
   if UpdateScripts():
     os.execv(sys.executable, [sys.executable] + sys.argv)
   sys.exit(main())