Sort the list of tools shown by cit.py's help message

cit.py

 #!/usr/bin/env python
 # Copyright (c) 2015 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.
 
 
 """Wrapper for updating and calling infra.git tools.
 
 This tool does a two things:
 * Maintains a infra.git checkout pinned at "deployed" in the home dir
@@ skipping 59 matching lines @@
       cwd=TARGET_DIR,
       stdout=subprocess.PIPE)
 
 
 def get_available_tools():
   tools = []
   starting = os.path.join(TARGET_DIR, 'infra', 'infra', 'tools')
   for root, _, files in os.walk(starting):
     if '__main__.py' in files:
       tools.append(root[len(starting)+1:].replace(os.path.sep, '.'))
-  return tools
+  return sorted(tools)
 
 
 def run(args):
   if args:
     tool_name = args[0]
     cmd = [
         sys.executable, os.path.join(TARGET_DIR, 'infra', 'run.py'),
         'infra.tools.%s' % tool_name]
     cmd.extend(args[1:])
     return subprocess.call(cmd)
@@ skipping 20 matching lines @@
     args.args.pop(0)
   if extras:
     args.args = extras + args.args
 
   if need_to_update(args.infra_branch):
     ensure_infra(args.infra_branch)
   return run(args.args)
 
 if __name__ == '__main__':
   sys.exit(main())