[gnome-sdk-images] Bump gtk to 3.18.5

[Alexander Larsson <alexl src gnome org>]

commit 175a80542bd1de3ca6dddb60b6804ab1487203f8
Author: Alexander Larsson <alexl redhat com>
Date:   Sun Nov 22 19:19:34 2015 +0100

    Bump gtk to 3.18.5

 specs/gtk3.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/specs/gtk3.spec b/specs/gtk3.spec
index 4bba01d..a7daeb3 100644
--- a/specs/gtk3.spec
+++ b/specs/gtk3.spec
@@ -3,7 +3,7 @@
 
 Summary: The GIMP ToolKit (GTK+), a library for creating GUIs for X
 Name: gtk3
-Version: 3.18.3
+Version: 3.18.5
 Release: 1%{?dist}
 License: LGPLv2+
 Group: System Environment/Libraries