[jhbuild] 3.20: use the gnome-3-20 branch of gnome-system-monitor

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 0b3f9f57bdca78a319a96fc93c90d0631ec6b8b1
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Nov 9 18:32:04 2016 +0200

    3.20: use the gnome-3-20 branch of gnome-system-monitor

 modulesets/gnome-suites-core-3.20.modules |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/modulesets/gnome-suites-core-3.20.modules b/modulesets/gnome-suites-core-3.20.modules
index 7b88a20..4882801 100644
--- a/modulesets/gnome-suites-core-3.20.modules
+++ b/modulesets/gnome-suites-core-3.20.modules
@@ -955,7 +955,7 @@
   </autotools>
 
   <autotools id="gnome-system-monitor">
-    <branch/>
+    <branch revision="gnome-3-20"/>
     <dependencies>
       <dep package="intltool"/>
       <dep package="glib"/>