quakespasm: add missing libX11

Grimmauld a0bdc22e aebf0e1e

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