Fix minor typo in java.gypi that could cause extra build work.

build/java.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 build Java in a consistent manner.
 #
 # To use this, create a gyp target with the following form:
 # {
 #   'target_name': 'my-package_java',
@@ skipping 199 matching lines @@
       'variables': {
         'all_src_dirs': [
           '>(java_in_dir)/src',
           '>@(additional_src_dirs)',
           '>@(generated_src_dirs)',
         ],
       },
       'inputs': [
         '<(DEPTH)/build/android/gyp/util/build_utils.py',
         '<(DEPTH)/build/android/gyp/javac.py',
-        '>!@(find >(java_in_dir) >(additional_src_dirs) -name "*.java")',
+        '>!@(find >(java_in_dir)/src >(additional_src_dirs) -name "*.java")',
         '>@(input_jars_paths)',
         '>@(additional_input_paths)',
       ],
       'outputs': [
         '<(compile_stamp)',
       ],
       'action': [
         'python', '<(DEPTH)/build/android/gyp/javac.py',
         '--output-dir=<(classes_dir)',
         '--classpath=>(input_jars_paths)',
@@ skipping 52 matching lines @@
     {
       'action_name': 'dex_<(_target_name)',
       'variables': {
         'dex_input_paths': [ '<(jar_path)' ],
         'output_path': '<(dex_path)',
       },
       'includes': [ 'android/dex_action.gypi' ],
     },
   ],
 }