[nautilus] libgd: update to latest commit

[Carlos Soriano Sánchez <csoriano src gnome org>]

commit 856ed033d61d0764b3ad0fea2024d9ed10877e06
Author: Carlos Soriano <csoriano gnome org>
Date:   Mon Sep 12 22:28:50 2016 +0200

    libgd: update to latest commit
    
    A translator modified that. I guess we need to be more careful
    with these situations.

 libgd |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgd b/libgd
index 56a19ad..752f65e 160000
--- a/libgd
+++ b/libgd
@@ -1 +1 @@
-Subproject commit 56a19ad9b056332ef07e508f1bdb6f03c6cb2590
+Subproject commit 752f65e91ea0d9a2ee8a2d21343bbd97bd0d038a