[totem] libgd: update to latest git master

[Cosimo Cecchi <cosimoc src gnome org>]

commit 372d90c45dc6b5c3590a110b4cdd7993bcd5cf5d
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Fri Dec 11 17:23:13 2015 -0800

    libgd: update to latest git master
    
    This accidentally got lost in commit
    c67e7926f505831d3c791230ef53ebc8a6b13a2d.

 libgd |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgd b/libgd
index 7c12355..9eecd99 160000
--- a/libgd
+++ b/libgd
@@ -1 +1 @@
-Subproject commit 7c1235591c4aa866b28c8b8dabdcb3b9084c5763
+Subproject commit 9eecd99e940a2579be64b79791337dc5048cabdc