Add 'android' to possible deps_os values.

gclient.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.
 
 """Meta checkout manager supporting both Subversion and GIT.
 
 Files
   .gclient      : Current client configuration, written by 'config' command.
                   Format is a Python script defining 'solutions', a list whose
@@ skipping 775 matching lines @@
   DEPS_OS_CHOICES = {
     "win32": "win",
     "win": "win",
     "cygwin": "win",
     "darwin": "mac",
     "mac": "mac",
     "unix": "unix",
     "linux": "unix",
     "linux2": "unix",
     "linux3": "unix",
+    "android": "android",
   }
 
   DEFAULT_CLIENT_FILE_TEXT = ("""\
 solutions = [
   { "name"        : "%(solution_name)s",
     "url"         : "%(solution_url)s",
     "deps_file"   : "%(deps_file)s",
     "managed"     : %(managed)s,
     "custom_deps" : {
     },
@@ skipping 794 matching lines @@
   except (gclient_utils.Error, subprocess2.CalledProcessError), e:
     print >> sys.stderr, 'Error: %s' % str(e)
     return 1
 
 
 if '__main__' == __name__:
   fix_encoding.fix_encoding()
   sys.exit(Main(sys.argv[1:]))
 
 # vim: ts=2:sw=2:tw=80:et: