message: Allow specifying extra build options via BAZEL_BUILD_EXTRA_OPTIONS
diff: @@ -63,7 +63,7 @@ BAZEL_OPTIONS="--package_path %workspace%:${ENVOY_SRCDIR}"
  export BAZEL_QUERY_OPTIONS="${BAZEL_OPTIONS}"
  export BAZEL_BUILD_OPTIONS="--strategy=Genrule=standalone --spawn_strategy=standalone \
  --verbose_failures ${BAZEL_OPTIONS} --action_env=HOME --action_env=PYTHONUSERBASE \
  - --jobs=${NUM_CPUS} --show_task_finish"
  + --jobs=${NUM_CPUS} --show_task_finish ${BAZEL_BUILD_EXTRA_OPTIONS}"
  export BAZEL_TEST_OPTIONS="${BAZEL_BUILD_OPTIONS} --test_env=HOME --test_env=PYTHONUSERBASE \
  --cache_test_results=no --test_output=all ${BAZEL_EXTRA_TEST_OPTIONS}"
  [[ "${BAZEL_EXPUNGE}" == "1" ]] && "${BAZEL}" clean --expunge
  