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

build/android/gyp/pack_relocations.py

 #!/usr/bin/env python
 #
 # 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.
 
 """Pack relocations in a library (or copy unchanged).
 
 If --enable-packing and --configuration-name=='Release', invoke the
 relocation_packer tool to pack the .rel.dyn or .rela.dyn section in the given
@@ skipping 72 matching lines @@
 
     if enable_packing:
       PackLibraryRelocations(options.android_pack_relocations,
                              library_path,
                              output_path)
     else:
       CopyLibraryUnchanged(library_path, output_path)
 
   if options.filelistjson:
     build_utils.WriteJson({ 'files': output_paths }, options.filelistjson)
+    output_paths.append(options.filelistjson)
 
   if options.depfile:
-    build_utils.WriteDepfile(
-        options.depfile,
-        libraries + build_utils.GetPythonDependencies())
+    build_utils.WriteDepfile(options.depfile, output_paths[-1], libraries)
 
   if options.stamp:
     build_utils.Touch(options.stamp)
 
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))