[jhbuild] 3.20: Use the gnome-3-20 branch for gnome-boxes

[Matthias Clasen <matthiasc src gnome org>]

commit 1889d49712f6a8ee0c4f649553f5c6f805b517d7
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Mar 22 15:05:19 2016 -0400

    3.20: Use the gnome-3-20 branch for gnome-boxes

 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 f700c96..c889fa6 100644
--- a/modulesets/gnome-apps-3.20.modules
+++ b/modulesets/gnome-apps-3.20.modules
@@ -553,7 +553,7 @@
   </autotools>
 
   <autotools id="gnome-boxes" autogenargs="--enable-vala">
-    <branch/>
+    <branch revision="gnome-3-20"/>
     <dependencies>
       <dep package="glib"/>
       <dep package="libxml2"/>