[gnome-music/wip/mschraal/update-libgd] build: Update libgd

[Marinus Schraal <mschraal src gnome org>]

commit 466532dad700c914650ab4e15475a27340433627
Author: Marinus Schraal <mschraal gnome org>
Date:   Sat Feb 16 23:16:09 2019 +0100

    build: Update libgd

 subprojects/libgd | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/subprojects/libgd b/subprojects/libgd
index 8a68efc5..c7c7ff4e 160000
--- a/subprojects/libgd
+++ b/subprojects/libgd
@@ -1 +1 @@
-Subproject commit 8a68efc5bc2b4c3f24ad4a41b1656f8557bb8b44
+Subproject commit c7c7ff4e05d3fe82854219091cf116cce6b19de0