[gnome-control-center] Update submodules

[Jasper St. Pierre <jstpierre src gnome org>]

commit 50752397e4a165110cdee3d9beea8ce1a5e2d05a
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Mon Jun 10 14:20:14 2013 -0400

    Update submodules

 egg-list-box |    2 +-
 libgd        |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/egg-list-box b/egg-list-box
index 9d825b6..1810c05 160000
--- a/egg-list-box
+++ b/egg-list-box
@@ -1 +1 @@
-Subproject commit 9d825b60070ce78a1d892b0888754be72b72033c
+Subproject commit 1810c054ef97833863deff909c46d34da7214bf2
diff --git a/libgd b/libgd
index 3abc95d..5bcd11f 160000
--- a/libgd
+++ b/libgd
@@ -1 +1 @@
-Subproject commit 3abc95da3c5b44484aeae3c69e3701da160bf057
+Subproject commit 5bcd11f1add8964ef0a056b2b7051bb97575a94b