add recipe continuous builders for each repo with recipes

scripts/slave/recipe_modules/luci_config/example.py

 # Copyright 2016 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.
 
 from recipe_engine.recipe_api import Property
 
 DEPS = [
   'luci_config',
   'recipe_engine/properties'
 ]
@@ skipping 16 matching lines @@
       api.luci_config.get_projects(['build']) +
       api.luci_config.get_project_config('build', 'recipes.cfg', 'testcontent')
   )
 
   yield (
       api.test('auth_token') +
       api.properties(auth_token='ya2930948320948203480=') +
       api.luci_config.get_projects(['build']) +
       api.luci_config.get_project_config('build', 'recipes.cfg', 'testcontent')
   )
+
+  protobuf_lines = """
+    foo: 1
+    bar: "hi"
+    baz: {
+      the_thing: "hi"
+    }
+  """
+
+  yield (
+      api.test('protobuf') +
+      api.luci_config.get_projects(['build']) +
+      api.luci_config.get_project_config(
+          'build', 'recipes.cfg', '\n'.join(protobuf_lines))
+  )