message: ci: Install llvm to get llvm symbolizer
diff: @@ -8,7 +8,7 @@ export LC_ALL=C.UTF-8
  export CONTAINER_NAME=ci_native_tsan
  export DOCKER_NAME_TAG=ubuntu:20.04
  -export PACKAGES="clang libc++abi-dev libc++-dev python3-zmq"
  +export PACKAGES="clang llvm libc++abi-dev libc++-dev python3-zmq"
  export DEP_OPTS="CC=clang CXX='clang++ -stdlib=libc++'"
  export GOAL="install"
  export BITCOIN_CONFIG="--enable-zmq --disable-wallet --with-gui=no CPPFLAGS='-DARENA_DEBUG -DDEBUG_LOCKORDER' --with-sanitizers=thread CC=clang CXX='clang++ -stdlib=libc++'"
  