Rev the version of apache ant in third_party to 1.8.4. This will fix an issue with

compiler/dartium.gyp

 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a

[ricow1, 2013/01/16 19:05:33]

why is this file called dartium.gyp?

[devoncarew, 2013/01/16 19:09:16]

I am wholly unfamiliar with this file; I'm guessing it is debris from past work
and is no longer used. It did have a reference to the old ant however, so I
updated that. 

 # BSD-style license that can be found in the LICENSE file.
 
 # TODO(vsm): Remove this file and use dart.gyp once that can be pulled
 # into the dartium build.
 {
   'includes': [
     # TODO(iposva): Move shared gyp setup to a shared location.
     '../tools/gyp/xcode.gypi',
     # TODO(mmendez): Add the appropriate gypi includes here.
   ],
   'targets': [
     {
       'target_name': 'dartc',
       'type': 'none',
       'actions': [
         {
           'action_name': 'Build and test',
           'inputs': [
           ],
           'outputs': [
             'dummy_target',
           ],
           'action' : [
-            '../third_party/apache_ant/v1_7_1/bin/ant',
+            '../third_party/apache_ant/1.8.4/bin/ant',
             '-Dbuild.dir=<(PRODUCT_DIR)/ant-out',
             'clean',
             'dist',
           ],
           'message': 'Building dartc.',
         },
       ],
     },
     {
       # GYP won't generate a catch-all target if there's only one target.
       'target_name': 'dummy',
       'type': 'none',
     },
   ],
 }