[jhbuild] 3.20: Use the gnome-3-20 branch of gnome-nibbles

[Matthias Clasen <matthiasc src gnome org>]

commit d39d7ff432c23c76af869b05ffbe873947d4d118
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Apr 11 21:36:26 2016 -0400

    3.20: Use the gnome-3-20 branch of gnome-nibbles

 modulesets/gnome-apps-3.20.modules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modulesets/gnome-apps-3.20.modules b/modulesets/gnome-apps-3.20.modules
index f3af1ca..3cab9d8 100644
--- a/modulesets/gnome-apps-3.20.modules
+++ b/modulesets/gnome-apps-3.20.modules
@@ -862,7 +862,7 @@
   </autotools>
 
   <autotools id="gnome-nibbles">
-    <branch/>
+    <branch revision="gnome-3-20"/>
     <dependencies>
       <dep package="appstream-glib"/>
       <dep package="clutter"/>