Add depfile support to android build scripts

build/android/gyp/jar_toc.py

Index: build/android/gyp/jar_toc.py
diff --git a/build/android/gyp/jar_toc.py b/build/android/gyp/jar_toc.py
index 1122f683c9e3b1cceae187da3aebbb781ca1bda9..0c7a849794a4220695b4c72e3b1a70a009bcda3a 100755
--- a/build/android/gyp/jar_toc.py
+++ b/build/android/gyp/jar_toc.py
@@ -92,6 +92,8 @@ def DoJarToc(options):
 
 def main():
   parser = optparse.OptionParser()
+  build_utils.AddDepfileOption(parser)
+
   parser.add_option('--jar-path', help='Input .jar path.')
   parser.add_option('--toc-path', help='Output .jar.TOC path.')
   parser.add_option('--stamp', help='Path to touch on success.')
@@ -100,6 +102,11 @@ def main():
 
   DoJarToc(options)
 
+  if options.depfile:
+    build_utils.WriteDepfile(
+        options.depfile,
+        build_utils.GetPythonDependencies())
+
   if options.stamp:
     build_utils.Touch(options.stamp)