[json] improve output to get leak_to and better logging.

recipe_modules/json/example.resources/cool_script.py

Index: recipe_modules/json/example.resources/cool_script.py
diff --git a/recipe_modules/json/example.resources/cool_script.py b/recipe_modules/json/example.resources/cool_script.py
new file mode 100755
index 0000000000000000000000000000000000000000..3c71c7d2574b651a47665ce64f9f9ddcf4771de3
--- /dev/null
+++ b/recipe_modules/json/example.resources/cool_script.py
@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+# Copyright 2017 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 sys
+
+def main(argv):
+  with open(argv[2], 'w') as f:
+    f.write(argv[1])
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))