title: building tensorboard from source
body: <p>I built Tensorflow from source and built Tensorboard via 
  bazel build tensorflow/contrib/tensorboard:tensorboard</p>
  
  <p>The build process finished but there is no tensorboard folder in 
  ./bazel-bin/tensorflow or ./bazel-bin/tensorflow/contrib</p>
  
  <p>any ideas how to find the binary so i can run 
  ./bazel-bin/tensorflow/contrib/tensorboard/tensorboard --logdir=path/to/logs
  ?</p>
  
  <p>OS: Ubuntu 16.04
  Tensorflow for Python3 with GPU support
  Thanks in advance</p>