GN(android): Use list of libraries rather than native_lib_dir in all places

build/android/gyp/pack_relocations.py

Index: build/android/gyp/pack_relocations.py
diff --git a/build/android/gyp/pack_relocations.py b/build/android/gyp/pack_relocations.py
index e1122653a2ef87be9cfd036e801be45f1651693b..1a4824ae671c13419f731f4306b4dda10ff90703 100755
--- a/build/android/gyp/pack_relocations.py
+++ b/build/android/gyp/pack_relocations.py
@@ -64,6 +64,8 @@ def main(args):
   parser.add_option('--libraries', action='append',
       help='List of libraries')
   parser.add_option('--stamp', help='Path to touch on success')
+  parser.add_option('--filelistjson',
+                    help='Output path of filelist.json to write')
 
   options, _ = parser.parse_args(args)
   enable_packing = (options.enable_packing == '1' and
@@ -80,10 +82,12 @@ def main(args):
 
   build_utils.MakeDirectory(options.packed_libraries_dir)
 
+  output_paths = []
   for library in libraries:
     library_path = os.path.join(options.stripped_libraries_dir, library)
     output_path = os.path.join(
         options.packed_libraries_dir, os.path.basename(library))
+    output_paths.append(output_path)
 
     if enable_packing and library not in exclude_packing_set:
       PackLibraryRelocations(options.android_pack_relocations,
@@ -92,6 +96,9 @@ def main(args):
     else:
       CopyLibraryUnchanged(library_path, output_path)
 
+  if options.filelistjson:
+    build_utils.WriteJson({ 'files': output_paths }, options.filelistjson)
+
   if options.depfile:
     build_utils.WriteDepfile(
         options.depfile,