Merge pull request #279182 from Ma27/eog-main-program

gnome.eog: add meta.mainProgram

pkgs/desktops/gnome/core/eog/default.nix

···
     license = licenses.gpl2Plus;
     maintainers = teams.gnome.members;
     platforms = platforms.unix;
+    mainProgram = "eog";
   };
 }