[gnome-photos/wip/rishi/thumbnailer: 5/13] Update to latest libgd

[Debarshi Ray <debarshir src gnome org>]

commit f4fd75003bb3ea3e3496c6c3eaa50e884a3f773a
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 97a852c..89bbe23 160000
--- a/libgd
+++ b/libgd
@@ -1 +1 @@
-Subproject commit 97a852cdf3d37776f9c98f730d7dcbbe995bdeb7
+Subproject commit 89bbe231c78dbc6a72284db3c24d2d121d8ae69f