[gnome-sdk-images] Update the extension versions for 1.6

[Alexander Larsson <alexl src gnome org>]

commit 28b391f450ab0d87f7538a2181784bb19d97a0ba
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Mar 15 10:30:57 2017 +0100

    Update the extension versions for 1.6

 org.gnome.Sdk.json.in |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index a8b4365..0eb2be0 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -11,6 +11,7 @@
     "finish-args": [
         "--extension=org.freedesktop.Platform.GL=directory=lib/GL",
         "--extension=org.freedesktop.Platform.GL=version=1.4",
+        "--extension=org.freedesktop.Platform.GL=versions=1.6;1.4",
         "--extension=org.freedesktop.Platform.GL=subdirectories=true",
         "--extension=org.freedesktop.Platform.GL=no-autodownload=true",
         "--extension=org.freedesktop.Platform.GL=autodelete=false",
@@ -19,9 +20,9 @@
         "--extension=org.freedesktop.Platform.GL=download-if=active-gl-driver",
         "--extension=org.freedesktop.Platform.GL=enable-if=active-gl-driver",
         "--extension=org.freedesktop.Platform.Timezones=directory=share/zoneinfo",
-        "--extension=org.freedesktop.Platform.Timezones=version=1.4",
+        "--extension=org.freedesktop.Platform.Timezones=version=1.6",
         "--extension=org.freedesktop.Platform.GStreamer=directory=lib/extensions/gstreamer-1.0",
-        "--extension=org.freedesktop.Platform.GStreamer=version=1.4",
+        "--extension=org.freedesktop.Platform.GStreamer=version=1.6",
         "--extension=org.freedesktop.Platform.GStreamer=subdirectories",
         "--env=GI_TYPELIB_PATH=/app/lib/girepository-1.0",
         
"--env=GST_PLUGIN_SYSTEM_PATH=/app/lib/gstreamer-1.0:/usr/lib/extensions/gstreamer-1.0:/usr/lib/gstreamer-1.0",