Allow "cross-compiling" with GRIT

ash/ash.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
   },
 
@@ skipping 578 matching lines @@
           'mac_bundle': 1,
           'sources/': [
             ['exclude', 'shell/shell_main_parts.cc'],
           ],
           'mac_bundle_resources': [
             'shell/cocoa/app.icns',
             'shell/cocoa/app-Info.plist',
             'shell/cocoa/nibs/MainMenu.xib',
             'shell/cocoa/nibs/RootWindow.xib',
             '<(SHARED_INTERMEDIATE_DIR)/repack/chrome.pak',
-            '<!@pymod_do_main(repack_locales -o -g <(grit_out_dir) -s <(SHARED_INTERMEDIATE_DIR) -x <(SHARED_INTERMEDIATE_DIR) <(locales))',
+            '<!@pymod_do_main(repack_locales -o -p <(OS) -g <(grit_out_dir) -s <(SHARED_INTERMEDIATE_DIR) -x <(SHARED_INTERMEDIATE_DIR) <(locales))',
           ],
           'mac_bundle_resources!': [
             'shell/cocoa/app-Info.plist',
           ],
           'xcode_settings': {
             'INFOPLIST_FILE': 'shell/cocoa/app-Info.plist',
           },
         }],
       ],
     },
   ],
 }