[jhbuild] core-3.26: use the gnome-3-26 branch of gnome-backgrounds

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 60c2ec2671274d9b2de9a066e6ff202bfd0cf432
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Dec 4 17:19:23 2017 +0200

    core-3.26: use the gnome-3-26 branch of gnome-backgrounds

 modulesets/gnome-suites-core-3.26.modules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modulesets/gnome-suites-core-3.26.modules b/modulesets/gnome-suites-core-3.26.modules
index 377962b..141fafc 100644
--- a/modulesets/gnome-suites-core-3.26.modules
+++ b/modulesets/gnome-suites-core-3.26.modules
@@ -133,7 +133,7 @@
   </autotools>
 
   <meson id="gnome-backgrounds">
-    <branch/>
+    <branch revision="gnome-3-26"/>
     <dependencies>
       <dep package="gettext"/>
       <dep package="glib"/>