Add dl library to Lua static library linking
If a Lua library is compiled from source as liblua.a linking of dl library is required.
Reference: https://github.com/Project-OSRM/osrm-backend/pull/3580
If a Lua library is compiled from source as liblua.a linking of dl library is required.
Reference: https://github.com/Project-OSRM/osrm-backend/pull/3580