[gnome-sdk-images] Update webkit to 2.12.1

[Alexander Larsson <alexl src gnome org>]

commit afe2a3759a4e3181223f0b0ce713e1529bdf1bee
Author: Alexander Larsson <alexl redhat com>
Date:   Wed May 11 09:53:27 2016 +0200

    Update webkit to 2.12.1

 org.gnome.Sdk.json.in |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index f3ac2ee..0a24682 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -650,11 +650,11 @@
                "-DENABLE_VIDEO=ON",
                "-DENABLE_WEB_AUDIO=ON"
            ],
-           "sources": [
+            "sources": [
                 {
                     "type": "archive",
-                    "url": "http://www.webkitgtk.org/releases/webkitgtk-2.11.5.tar.xz";,
-                    "sha256": "f6bb102ec2db2f1c134280551cd19fac9ea067324268709df97c2221b08baa02"
+                    "url": "http://www.webkitgtk.org/releases/webkitgtk-2.12.1.tar.xz";,
+                    "sha256": "5b1a2d5227553f3cecbdb258c68b384f9235747b2c07c15afb555fe4fa6ae896"
                 },
                 {
                     "type": "patch",