Support for arm64 build.

mojo/tools/mojob.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 """A simple script to make building/testing Mojo components easier."""
 
 import argparse
 from copy import deepcopy
 import logging
@@ skipping 266 matching lines @@
                         action='store_true')
   os_group.add_argument('--fnl', help='Build for FNL',
                         action='store_true')
 
   parent_parser.add_argument('--simulator',
                              help='Build for a simulator of the target',
                              action='store_true')
 
   parent_parser.add_argument('--target-cpu',
                              help='CPU architecture to build for.',
-                             choices=['x64', 'x86', 'arm'])
+                             choices=['x64', 'x86', 'arm', 'arm64'])
 
   parent_parser.add_argument('--target-sysroot',
                              help='Location of sysroot for target',
                              default='',
                              dest='target_sysroot')
 
   parent_parser.add_argument('--toolchain-prefix',
                              help='Toolchain prefix',
                              default='',
                              dest='toolchain_prefix')
@@ skipping 60 matching lines @@
   InitLogging(_verbose_count)
 
   if args.simulator and not args.ios:
     sys.exit("Currently, the simulator target is only configured for iOS")
 
   return args.func(_args_to_config(args))
 
 
 if __name__ == '__main__':
   sys.exit(main())