message: Adding --distinct_host_configuration=false in tools/bazel.rc
  When building TensorFlow, the host and target platforms are usually the same. So we don't have to distinct them by default. This helps avoid building the same targets twice.
  If we need to do cross compilation, add --config=cross-compile to distinct them.
diff: +# By default, we don't distinct target and host platfroms.
  +# When doing cross compilation, use --config=cross_compile to distinct them.
  +build --distinct_host_configuration=false
  +build:cross_compile --distinct_host_configuration=true
  +
  # Android configs. Bazel needs to have --cpu and --fat_apk_cpu both set to the
  # target CPU to build transient dependencies correctly. See
  # https://docs.bazel.build/versions/master/user-manual.html#flag--fat_apk_cpu
  build:android --crosstool_top=//external:android/crosstool
  build:android --host_crosstool_top=@bazel_tools//tools/cpp:toolchain
  +build:android --config=cross_compile
  build:android_arm --config=android
  build:android_arm --cpu=armeabi-v7a
  build:android_arm --fat_apk_cpu=armeabi-v7a
  