treewide: Add passthru.updateScript to gnome pkgs

`updateScript` lets us update packages automatically.
For packages that are hosted on the gnome mirror it's very easy to add
that. Inspired by https://github.com/NixOS/nixpkgs/issues/36150

pkgs/development/libraries/libgnome-keyring/default.nix

@@ -1,11 +1,11 @@
-{ stdenv, fetchurl, glib, dbus, libgcrypt, pkgconfig,
-intltool }:
+{ stdenv, fetchurl, glib, dbus, libgcrypt, pkgconfig, intltool }:
 
-stdenv.mkDerivation {
-  name = "libgnome-keyring-2.32.0";
+stdenv.mkDerivation rec {
+  pname = "libgnome-keyring";
+  version = "2.32.0";
 
   src = fetchurl {
-    url = mirror://gnome/sources/libgnome-keyring/2.32/libgnome-keyring-2.32.0.tar.bz2;
+    url = "mirror://gnome/sources/${pname}/${stdenv.lib.versions.majorMinor version}/${pname}-${version}.tar.bz2";
     sha256 = "030gka96kzqg1r19b4xrmac89hf1xj1kr5p461yvbzfxh46qqf2n";
   };