[gnome-sdk-images] Upgrade to the latest WebkitGtk release

[Mathieu Bridon <mbridon src gnome org>]

commit d03e5ead9c0604082391b38d542831091d7bd0d6
Author: Mathieu Bridon <bochecha daitauha fr>
Date:   Mon Mar 20 12:04:30 2017 +0100

    Upgrade to the latest WebkitGtk release

 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 b3b26f3..279ace8 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -770,8 +770,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://www.webkitgtk.org/releases/webkitgtk-2.15.90.tar.xz";,
-                    "sha256": "d9c13cf5b1db9e398d9d6a55e1b272a85e86bd00650cc068a9744864f48996ba"
+                    "url": "https://webkitgtk.org/releases/webkitgtk-2.16.0.tar.xz";,
+                    "sha256": "5ea371d8910ef3ce7f7d087242c5646f8f3073a5298287c9eb60e055ec107cdc"
                 },
                 {
                     "type": "patch",