message: tidy: use libstdc++
diff: @@ -283,8 +283,10 @@ elif [[ "$CI_TARGET" == "bazel.coverage" || "$CI_TARGET" == "bazel.fuzz_coverage
  collect_build_profile coverage
  exit 0
  elif [[ "$CI_TARGET" == "bazel.clang_tidy" ]]; then
  + # clang-tidy will warn on standard library issues with libc++
  + ENVOY_STDLIB="libstdc++"
  setup_clang_toolchain
  - NUM_CPUS=$NUM_CPUS ci/run_clang_tidy.sh $*
  + NUM_CPUS=$NUM_CPUS ci/run_clang_tidy.sh "$@"
  exit 0
  elif [[ "$CI_TARGET" == "bazel.coverity" ]]; then
  # Coverity Scan version 2017.07 fails to analyze the entirely of the Envoy
  