[gnome-photos/gnome-3-22] Update to latest libgd

[Debarshi Ray <debarshir src gnome org>]

commit 4d7d93293967afe3d26f85a37c3c5743c1eb2434
Author: Debarshi Ray <debarshir gnome org>
Date:   Sat Nov 19 11:50:18 2016 +0100

    Update to latest libgd
    
    Avoid changing .gitignore after every build.

 libgd |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgd b/libgd
index a0717ad..1f2e074 160000
--- a/libgd
+++ b/libgd
@@ -1 +1 @@
-Subproject commit a0717ad8c078c07ea9d10aed385d30198fd24b03
+Subproject commit 1f2e07409cf085b74370f8a985de849d0f6d4b57