[gnome-sdk-images] Fix json syntax

[Matthias Clasen <matthiasc src gnome org>]

commit 955a6cfc4777c5f55a0df3fc42ac4a3a66a47173
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Apr 16 00:15:30 2016 -0400

    Fix json syntax
    
    A missing comma...

 org.gnome.Sdk.json |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/org.gnome.Sdk.json b/org.gnome.Sdk.json
index 9e983ff..2e602c0 100644
--- a/org.gnome.Sdk.json
+++ b/org.gnome.Sdk.json
@@ -569,7 +569,7 @@
                 {
                     "type": "patch",
                     "path": "webkitgtk-cmake-buildapi.patch"
-                }
+                },
                 {
                     "type": "file",
                     "path": "webkitgtk-configure",