message: Change `saved_model_builder` to `saved_model.builder`.
diff: @@ -238,7 +238,7 @@ For example, the following code suggests a typical way to use
  ```python
  export_dir = ...
  ...
  -builder = tf.saved_model_builder.SavedModelBuilder(export_dir)
  +builder = tf.saved_model.builder.SavedModelBuilder(export_dir)
  with tf.Session(graph=tf.Graph()) as sess:
  ...
  builder.add_meta_graph_and_variables(sess,
  