kega-fusion: add missing libGL dependency

Without this dependency, starting kega-fusion would fail with:

.../lib/kega-fusion/Fusion: error while loading shared libraries: libGL.so.1: cannot open shared object file: No such file or directory

Fixes #231028

pkgs/applications/emulators/kega-fusion/default.nix

···
-{ stdenv, lib, writeText, fetchurl, upx, libGLU, glib, gtk2, alsa-lib, libSM, libX11, gdk-pixbuf, pango, libXinerama, mpg123, runtimeShell }:
+{ stdenv, lib, writeText, fetchurl, upx, libGL, libGLU, glib, gtk2, alsa-lib, libSM, libX11, gdk-pixbuf, pango, libXinerama, mpg123, runtimeShell }:
 
 let
-  libPath = lib.makeLibraryPath [ stdenv.cc.cc libGLU glib gtk2 alsa-lib libSM libX11 gdk-pixbuf pango libXinerama ];
+  libPath = lib.makeLibraryPath [ stdenv.cc.cc libGL libGLU glib gtk2 alsa-lib libSM libX11 gdk-pixbuf pango libXinerama ];
 
 in stdenv.mkDerivation {
   pname = "kega-fusion";