message: Linkify eager and tflite in release notes.
diff: This may break TF on older CPUs.
  ## Major Features And Improvements
  -* Eager execution preview version is available under `tensorflow/contrib/eager/`.
  -* TensorFlow Lite dev preview is now in `tensorflow/contrib/lite/`.
  +* [Eager execution](https://github.com/tensorflow/tensorflow/tree/r1.5/tensorflow/contrib/eager)
  + preview version is now available.
  +* [TensorFlow Lite](https://github.com/tensorflow/tensorflow/tree/r1.5/tensorflow/contrib/lite)
  + dev preview is now available.
  * CUDA 9 and cuDNN 7 support.
  ## Bug Fixes and Other Changes
  