message: Fix a couple of broken links in the Swift For TensorFlow page.
diff: @@ -28,8 +28,8 @@ print(x)
  ```
  Swift combines the flexibility of
  -[Eager Execution](programmers_guide/eager) with the
  -high performance of [Graphs and Sessions](programmers_guide/graphs).
  +[Eager Execution](https://www.tensorflow.org/programmers_guide/eager) with the
  +high performance of [Graphs and Sessions](https://www.tensorflow.org/programmers_guide/graphs).
  Behind the scenes, Swift analyzes your Tensor code and automatically builds
  graphs for you. Swift also catches type errors and shape mismatches before
  running your code, and has [Automatic Differentiation](https://en.wikipedia.org/wiki/Automatic_differentiation)
  