[gnome-photos/wip/rishi/thumbnailer: 6/6] Update to latest libgd

[Debarshi Ray <debarshir src gnome org>]

commit b97e4ea7164214e256a20a2946f13d5c630b3b3a
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Feb 21 13:49:35 2017 +0100

    Update to latest libgd
    
    GdMainIconBoxChild now expands the thumbnail as the GtkFlowBox is
    resized.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=777869

 libgd |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgd b/libgd
index 1bd7f34..a3a828e 160000
--- a/libgd
+++ b/libgd
@@ -1 +1 @@
-Subproject commit 1bd7f34a58f11f4bdebcbe5ca3371b89c6c2c83c
+Subproject commit a3a828e592d43392a0641fe860ff3a6dcb4556e4