superTux: explicitly link X libraries
superTux: explicitly link X libraries

It does not make sense why SDL doesn't propagate these build inputs
or why they're also required on Wayland, but it works so ¯\_(ツ)_/¯

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs