add wrapper to make GYP_PARALLEL=1 work for build\gyp_chromium

This is a workaround for multiprocessing on Windows. Importing in Python on
Windows doesn't search for imports that don't end in .py (and aren't
directories with an __init__.py). So, add this wrapper to avoid having
people change their command line to add a .py when running gyp_chromium.

R=dmazzoni@chromium.org

Review URL: https://codereview.chromium.org/11066021

git-svn-id: http://src.chromium.org/svn/trunk/src/build@160151 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

gyp_chromium.py

@@ -0,0 +1,9 @@
+# Copyright 2012 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.
+
+# This is a workaround for multiprocessing on Windows. Importing in Python on
+# Windows doesn't search for imports that don't end in .py (and aren't
+# directories with an __init__.py). So, add this wrapper to avoid having
+# people change their command line to add a .py when running gyp_chromium.
+__import__('gyp_chromium')