quakespasm: add missing libX11

Grimmauld a0bdc22e aebf0e1e

+2
+2
pkgs/games/quakespasm/vulkan.nix
··· 8 8 libmpg123, 9 9 libopus, 10 10 libvorbis, 11 + libX11, 11 12 makeWrapper, 12 13 meson, 13 14 moltenvk, ··· 48 49 libmpg123 49 50 libopus 50 51 libvorbis 52 + libX11 51 53 opusfile 52 54 vulkan-loader 53 55 ]