Depend on libdbus-1 to build on newer distros.
Building on newer distros fails to link against libdbus-1 as it seems to not get added automatically any more, or has become a dependency of another library we use. So we link to it explicitly now.
Building on newer distros fails to link against libdbus-1 as it seems to not get added automatically any more, or has become a dependency of another library we use. So we link to it explicitly now.