message: Build TF on Windows with --config=opt
  config=opt will enable /arch:AVX cc option on Windows
  c opt is already specified in tools/bazel.rc, no it's OK to remove it here
diff: @@ -77,7 +77,7 @@ echo "import %workspace%/${TMP_BAZELRC}" >> .bazelrc
  run_configure_for_cpu_build
  -bazel build --announce_rc -c opt tensorflow/tools/pip_package:build_pip_package || exit $?
  +bazel build --announce_rc --config=opt tensorflow/tools/pip_package:build_pip_package || exit $?
  if [[ "$skip_test" == 1 ]]; then
  exit 0
  @@ -98,7 +98,7 @@ N_JOBS="${NUMBER_OF_PROCESSORS}"
  # Define no_tensorflow_py_deps=true so that every py_test has no deps anymore,
  # which will result testing system installed tensorflow
  -bazel test -c opt -k --test_output=errors \
  +bazel test --announce_rc --config=opt -k --test_output=errors \
  --define=no_tensorflow_py_deps=true --test_lang_filters=py \
  --test_tag_filters=-no_pip,-no_windows,-no_oss \
  --build_tag_filters=-no_pip,-no_windows,-no_oss --build_tests_only \
  