[gnome-sdk-images] Add icon and gtk3 theme extension point

[Alexander Larsson <alexl src gnome org>]

commit 5c0a53f8dc734adc3623cdc6e80912e7cfb288f6
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Apr 19 14:24:50 2017 +0200

    Add icon and gtk3 theme extension point

 org.gnome.Sdk.json.in |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/org.gnome.Sdk.json.in b/org.gnome.Sdk.json.in
index 369f781..afcdd2a 100644
--- a/org.gnome.Sdk.json.in
+++ b/org.gnome.Sdk.json.in
@@ -24,12 +24,22 @@
         "--extension=org.freedesktop.Platform.GStreamer=directory=lib/extensions/gstreamer-1.0",
         "--extension=org.freedesktop.Platform.GStreamer=version=1.6",
         "--extension=org.freedesktop.Platform.GStreamer=subdirectories",
+        "--extension=org.freedesktop.Platform.Icontheme=directory=share/runtime/share/icons",
+        "--extension=org.freedesktop.Platform.Icontheme=subdirectories=true",
+        "--extension=org.freedesktop.Platform.Icontheme=no-autodownload=true",
+        "--extension=org.freedesktop.Platform.Icontheme=version=1.0",
         "--extension=org.freedesktop.Sdk.Extension=subdirectories",
         "--extension=org.freedesktop.Sdk.Extension=directory=lib/sdk",
         "--extension=org.freedesktop.Sdk.Extension=no-autodownload=true",
         "--extension=org.freedesktop.Sdk.Extension=version=1.6",
+        "--extension=org.gtk.Gtk3theme=directory=share/runtime/share/themes",
+        "--extension=org.gtk.Gtk3theme=subdirectories=true",
+        "--extension=org.gtk.Gtk3theme=subdirectory-suffix=gtk-3.0",
+        "--extension=org.gtk.Gtk3theme=no-autodownload=true",
+        "--extension=org.gtk.Gtk3theme=version=3.22",
         "--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",
+        "--env=XDG_DATA_DIRS=/app/share:/usr/share:/usr/share/runtime/share",
         "--sdk=org.gnome.Sdk//@@SDK_BRANCH@@",
         "--runtime=org.gnome.Platform//@@SDK_BRANCH@@"
     ],