linux_xanmod: switch from GitHub to GitLab

{

  lib,

  stdenv,

  fetchFromGitHub,

  fetchFromGitLab,

  buildLinux,

  variant,

  ...

        pname = "linux-xanmod";

        modDirVersion = lib.versions.pad 3 "${version}-${suffix}";

        src = fetchFromGitHub {

        src = fetchFromGitLab {

          owner = "xanmod";

          repo = "linux";

          rev = modDirVersion;