Add CIPD GAE SDK recipe module and packager.

scripts/slave/recipe_modules/chromium_android/example.expected/webview_cts_unexecuted_tests.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "cleanup index.lock",
     "~followup_annotations": [
@@ skipping 993 matching lines @@
       "@@@STEP_NEST_LEVEL@1@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::zip]/resources/unzip.py"
     ],
     "name": "Update CTS.Extract new CTS",
-    "stdin": "{\"output\": \"[CACHE]/android_cts/unzipped\", \"zip_file\": \"[CACHE]/android_cts/cts_arm64_L.zip\"}",
+    "stdin": "{\"output\": \"[CACHE]/android_cts/unzipped\", \"quiet\": false, \"zip_file\": \"[CACHE]/android_cts/cts_arm64_L.zip\"}",
     "~followup_annotations": [
       "@@@STEP_NEST_LEVEL@1@@@"
     ]
   },
   {
     "cmd": [
       "[CACHE]/android_cts/unzipped/android-cts/tools/cts-tradefed",
       "run",
       "cts",
       "-p",
@@ skipping 35 matching lines @@
       "@@@STEP_FAILURE@@@"
     ]
   },
   {
     "name": "$result",
     "reason": "Tests not executed.",
     "recipe_result": null,
     "status_code": 1
   }
 ]