[gnome-sdk-images/gnome-3-26] Update webkit to 2.18.2

[Alexander Larsson <alexl src gnome org>]

commit 428048cd3eff8e6bee8d694e329d5586711eef2c
Author: Alexander Larsson <alexl redhat com>
Date:   Mon Nov 13 09:41:51 2017 +0100

    Update webkit to 2.18.2

 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 36de240..1bf51c9 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -621,8 +621,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://webkitgtk.org/releases/webkitgtk-2.18.1.tar.xz";,
-                    "sha256": "9cdb7b302fbc8a2a7e1e783b80391e64f8b12d70d6ebad4eb756dd59bf3ed795"
+                    "url": "https://webkitgtk.org/releases/webkitgtk-2.18.2.tar.xz";,
+                    "sha256": "b14cb3f1b5321b1dc50abcc0445a97f8e2f8813562bca7ce4d2f8069f6fec8e7"
                 },
                 {
                     "type": "patch",