message: Update code owner for contrib/{kafka,kinesis}
  Add myself so that issues or PRs could be assigned to me.
  Note contrib/{kafka,kinesis} might be moved:
diff: /tensorflow/contrib/gan/ @joel-shor
  /tensorflow/contrib/graph_editor/ @purpledog
  # NEED OWNER: /tensorflow/contrib/grid_rnn/
  +/tensorflow/contrib/hadoop @yongtang
  /tensorflow/contrib/hvx/ @satok16
  /tensorflow/contrib/integrate/ @shoyer
  +/tensorflow/contrib/kafka @yongtang
  /tensorflow/contrib/kernel_methods/ @petrosmol
  +/tensorflow/contrib/kinesis @yongtang
  /tensorflow/contrib/ios_examples/ @petewarden
  /tensorflow/contrib/labeled_tensor/ @shoyer
  /tensorflow/contrib/layers/ @fchollet @martinwicke
  