[gnome-sdk-images] Update to WebKitGTK+ 2.19.2

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 34763c86cd7a95d500c3084b2d24ce95b86da674
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Tue Nov 21 09:29:30 2017 -0600

    Update to WebKitGTK+ 2.19.2

 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 8202766..180fb4d 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -793,8 +793,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://webkitgtk.org/releases/webkitgtk-2.19.1.tar.xz";,
-                    "sha256": "9f78555486ea11d53c90394da4d38a7d5b06e76d5b563182a4ed8326adc4cce5"
+                    "url": "https://webkitgtk.org/releases/webkitgtk-2.19.2.tar.xz";,
+                    "sha256": "439e88894accd4849d218b29a0755d25aa6c79224fc700206c860108d223d4c3"
                 }
             ]
         },