message: Fix broken URL in `tensorflow/java/README.md`
  Fixes broken URL in `tensorflow/java/README.md`, this fix fixes 12141.
diff: @@ -22,9 +22,9 @@ native libraries will need to be built from source.
  1. Install [bazel](https://www.bazel.build/versions/master/docs/install.html)
  2. Setup the environment to build TensorFlow from source code
  - ([Linux](https://www.tensorflow.org/versions/master/get_started/os_setup.html#prepare-environment-for-linux)
  + ([Linux](https://www.tensorflow.org/install/install_sources#PrepareLinux)
  or [Mac OS
  - X](https://www.tensorflow.org/versions/master/get_started/os_setup.html#prepare-environment-for-mac-os-x)).
  + X](https://www.tensorflow.org/install/install_sources#PrepareMac)).
  If you'd like to skip reading those details and do not care about GPU
  support, try the following:
  