[gnome-sdk-images] webkit: bump to 2.15.2

[Christian Hergert <chergert src gnome org>]

commit 22bbfd088b5439d007c8e02fa35ab0a70b9ab49e
Author: Christian Hergert <chergert redhat com>
Date:   Wed Nov 30 00:24:32 2016 -0800

    webkit: bump to 2.15.2
    
    Epiphany uses 2.15.2 now, and by updating this in the SDK we can get
    everyone testing the same webkitgtk version easily.

 org.gnome.Sdk.json.in |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index 62c19af..37850cd 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -703,8 +703,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://www.webkitgtk.org/releases/webkitgtk-2.14.2.tar.xz";,
-                    "sha256": "2edbcbd5105046aea55af9671c4de8deedb5b0e3567c618034d440a760675556"
+                    "url": "https://www.webkitgtk.org/releases/webkitgtk-2.15.2.tar.xz";,
+                    "sha256": "756f14ad2ca84e25dc245f2b736ab31de58d1eb66fef76e75a1985179072471f"
                 },
                 {
                     "type": "patch",