nginxModules.njs: 0.8.7 -> 0.8.9

    src = fetchFromGitHub {

      owner = "nginx";

      repo = "njs";

      rev = "0.8.7";

      hash = "sha256-VEXzP+cN5hnDeniccwY7GIi4x460rnWO/o7ja3DyRCc=";

      rev = "0.8.9";

      hash = "sha256-TalS9EJP+vB1o3BKaTvXXnudjKhNOcob3kDAyeKej3c=";

    };

    # njs module sources have to be writable during nginx build, so we copy them