[Android] Fix reference to dex.py after it was moved in r192265.

build/uiautomator_test.gypi

 # Copyright (c) 2013 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.
 
 # This file is meant to be included into a target to provide a rule
 # to build uiautomator dexed tests jar.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'test_suite_name',
 #   'type': 'none',
 #   'includes': ['path/to/this/gypi/file'],
 # }
 #
 
 {
   'dependencies': [
     '<(DEPTH)/tools/android/android_tools.gyp:android_tools',
   ],
   'variables': {
     'output_dex_path': '<(PRODUCT_DIR)/lib.java/<(_target_name).dex.jar',
   },
   'actions': [
     {
       'action_name': 'dex_<(_target_name)',
       'message': 'Dexing <(_target_name) jar',
       'inputs': [
         '<(DEPTH)/build/android/pylib/build_utils.py',
-        '<(DEPTH)/build/android/dex.py',
+        '<(DEPTH)/build/android/gyp/dex.py',
         '>@(library_dexed_jars_paths)',
       ],
       'outputs': [
         '<(output_dex_path)',
       ],
       'action': [
-        'python', '<(DEPTH)/build/android/dex.py',
+        'python', '<(DEPTH)/build/android/gyp/dex.py',
         '--dex-path=<(output_dex_path)',
         '--android-sdk-root=<(android_sdk_root)',
 
         # TODO(newt): remove this once http://crbug.com/177552 is fixed in ninja.
         '--ignore=>!(echo \'>(_inputs)\' | md5sum)',
 
         '>@(library_dexed_jars_paths)',
       ],
     },
   ],
 }