[gnome-sdk-images/gnome-3-24] Update to latest gtk3 (3.22.15)

[Alexander Larsson <alexl src gnome org>]

commit e21538d36b25af39bd25382de422fd76fc47aa2b
Author: Alexander Larsson <alexl redhat com>
Date:   Fri May 12 11:38:23 2017 +0200

    Update to latest gtk3 (3.22.15)

 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 5d52072..be9259d 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -372,8 +372,8 @@
             "sources": [
                 {
                     "type": "archive",
-                    "url": "https://download.gnome.org/sources/gtk+/3.22/gtk+-3.22.12.tar.xz";,
-                    "sha256": "84fae0cefb6a11ee2b4e86b8ac42fe46a3d30b4ad16661d5fc51e8ae03e2a98c"
+                    "url": "https://download.gnome.org/sources/gtk+/3.22/gtk+-3.22.15.tar.xz";,
+                    "sha256": "c8a012c2a99132629ab043f764a2b7cb6388483a015cd15c7a4288bec3590fdb"
                 }
             ]
         },