[NCCL 2.2](https://developer.nvidia.com/nccl). See updated install guides:
    [TensorFlow GPU support](https://www.tensorflow.org/install/gpu) and
    [Build TensorFlow from source](https://www.tensorflow.org/install/source).
*   Starting from TensorFlow 1.11, Windows builds will use Bazel. Therefore, we
    will drop official support for cmake.

## Bug Fixes and Other Changes

*   `tf.data`:

build:resultstore --google_default_credentials
build:resultstore --bes_backend=buildeventservice.googleapis.com
build:resultstore --bes_instance_name="tensorflow-testing"
build:resultstore --bes_results_url="https://source.cloud.google.com/results/invocations"
build:resultstore --bes_timeout=600s

# Flag to enable remote config
common --experimental_repo_remote_exec

# Make Bazel not try to probe the host system for a C++ toolchain.