[gnome-control-center] build: Require a newer libgd

[Bastien Nocera <hadess src gnome org>]

commit dcf92b4a9f67c2c0dbec3597a891096b413ed992
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Feb 21 12:41:48 2013 +0100

    build: Require a newer libgd
    
    That will check for the correct version of GTK+

 libgd |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgd b/libgd
index 1098bdd..1668007 160000
--- a/libgd
+++ b/libgd
@@ -1 +1 @@
-Subproject commit 1098bdd6835baf4cd0342eca686528024d6c0839
+Subproject commit 16680070f0e7b386134d0e1a900acc7b12aff009