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

build/android/incremental_install/generate_android_manifest.py

 #!/usr/bin/env python
 #
 # Copyright 2015 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.
 """Creates an AndroidManifest.xml for an incremental APK.
 
 Given the manifest file for the real APK, generates an AndroidManifest.xml with
 the application class changed to IncrementalApplication.
 """
@@ skipping 83 matching lines @@
 def main():
   options = _ParseArgs()
   with open(options.src_manifest) as f:
     main_manifest_data = f.read()
   new_manifest_data = _ProcessManifest(main_manifest_data,
                                        options.disable_isolated_processes)
   with open(options.out_manifest, 'w') as f:
     f.write(new_manifest_data)
 
   if options.depfile:
-    build_utils.WriteDepfile(
-        options.depfile,
-        [options.src_manifest] + build_utils.GetPythonDependencies())
+    deps = [options.src_manifest]
+    build_utils.WriteDepfile(options.depfile, options.out_manifest, deps)
 
 
 if __name__ == '__main__':
   main()