gnu: gdm: Update to 3.26.2.1.

* gnu/packages/gnome.scm (gdm): Update to 3.26.2.1.

gnu/packages/gnome.scm

@@ -28,7 +28,7 @@
 ;;; Copyright © 2017 Chris Marusich <cmmarusich@gmail.com>
 ;;; Copyright © 2017 Mohammed Sadiq <sadiq@sadiqpk.org>
 ;;; Copyright © 2017 Brendan Tildesley <brendan.tildesley@openmailbox.org>
-;;; Copyright © 2017 Rutger Helling <rhelling@mykolab.com>
+;;; Copyright © 2017, 2018 Rutger Helling <rhelling@mykolab.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -5230,7 +5230,7 @@ libxml2.")
 (define-public gdm
   (package
     (name "gdm")
-    (version "3.24.2")
+    (version "3.26.2.1")
     (source (origin
               (method url-fetch)
               (uri (string-append "mirror://gnome/sources/" name "/"
@@ -5238,7 +5238,7 @@ libxml2.")
                                   name "-" version ".tar.xz"))
               (sha256
                (base32
-                "1s2xzrwcjhfb4ra8jrxqfycs1jpv97id0f6idb2h6vjkspxbjy23"))))
+                "0mxdal6hh345xk2xqmw5192jgpprkbcv1d4bwmnl4arcc00cpp8p"))))
     (build-system glib-or-gtk-build-system)
     (arguments
      '(#:configure-flags