gtklock: set mainProgram

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

+1
+1
pkgs/tools/wayland/gtklock/default.nix
··· 52 52 license = licenses.gpl3; 53 53 maintainers = with maintainers; [ dit7ya ]; 54 54 platforms = platforms.linux; 55 + mainProgram = "gtklock"; 55 56 }; 56 57 }