Add CIPD GAE SDK recipe module and packager.

scripts/slave/recipe_modules/gae_sdk/example.py

+# Copyright 2015 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.
+
+DEPS = [
+  'depot_tools/cipd',
+  'gae_sdk',
+  'recipe_engine/path',
+  'recipe_engine/platform',
+]
+
+
+def RunSteps(api):
+  api.cipd.install_client()
+
+  for plat in api.gae_sdk.platforms:
+    out = api.path['build'].join('gae_sdk', '%s_%s' % (plat, api.platform.name))
+    try:
+      api.gae_sdk.fetch(plat, out)
+    except api.gae_sdk.PackageNotFound as e:
+      pass
+
+
+def GenTests(api):
+  yield (
+      api.test('win') +
+      api.platform('win', 64))
+
+  yield (
+      api.test('linux') +
+      api.platform('linux', 64))
+
+  yield (
+      api.test('mac') +
+      api.platform('mac', 64))