Add input content checking to some build scripts

build/java_prebuilt.gypi

 # 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.
 
 # This file is meant to be included into a target to provide a rule
 # to package prebuilt Java JARs in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my-package_java',
@@ skipping 19 matching lines @@
       'input_jars_paths': ['<(jar_path)'],
       'library_dexed_jars_paths': ['<(dex_path)'],
     },
   },
   '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',
         '<(jar_path)',
       ],
       'outputs': [
         '<(dex_path)',
       ],
       'action': [
-        'python', '<(DEPTH)/build/android/dex.py',
+        'python', '<(DEPTH)/build/android/gyp/dex.py',
         '--dex-path=<(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)',
 
         '<(jar_path)',
       ]
     },
 
   ],
 }