gnu: eduke32, fury: Update to 20240316-10564-0bc78c53d.

Hi, this updates the eduke32 and fury packages and fixes the build issue reported in #319 (closed). The actual fix is just adding gdk-pixbuf to native inputs. By the time I realized that however I had already rewritten the packages from scratch, and I didn’t see much point in making a separate commit.

The wrapper script, rpath tweak and sdl-union are no longer necessary. The new package uses gexps, release tarball instead of git, and installs the map editor help file (no editor for the fury version). I tested the updated packages on x86_64 with the original game (standard and high-res textures), and Ion Fury and its expansion.