message: Also replace FastGFile to GFile in label_wav_dir.py
diff: @@ -46,7 +46,7 @@ FLAGS = None
  def load_graph(filename):
  """Unpersists graph from file as default graph."""
  - with tf.gfile.FastGFile(filename, 'rb') as f:
  + with tf.gfile.GFile(filename, 'rb') as f:
  graph_def = tf.GraphDef()
  graph_def.ParseFromString(f.read())
  tf.import_graph_def(graph_def, name='')
  