Fix android depfiles to always list GN's outputs[0]

build/android/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/android/rules.gni")
 
 if (enable_java_templates) {
   import("//third_party/ijar/ijar.gni")
 
   sun_tools_jar_path = "$root_gen_dir/sun_tools_jar/tools.jar"
 
   # Create or update the API versions cache if necessary by running a
   # functionally empty lint task. This prevents racy creation of the
   # cache while linting java targets in android_lint.
   android_lint("prepare_android_lint_cache") {
     android_manifest = "//build/android/AndroidManifest.xml"
     create_cache = true
   }
 
   action("find_sun_tools_jar") {
     script = "//build/android/gyp/find_sun_tools_jar.py"
     depfile = "$target_gen_dir/$target_name.d"
     outputs = [
-      depfile,
       sun_tools_jar_path,
     ]
     args = [
       "--depfile",
       rebase_path(depfile, root_build_dir),
       "--output",
       rebase_path(sun_tools_jar_path, root_build_dir),
     ]
   }
 
@@ skipping 113 matching lines @@
   _target_name = get_path_info(script, "name") + "_wrapper"
   _wrapper_targets += [ ":$_target_name" ]
   wrapper_script(_target_name) {
     target = script
   }
 }
 
 group("wrapper_scripts") {
   deps = _wrapper_targets
 }