[shotwell] flatpak: Temporarily downgrade SDK

[Jens Georg <jensgeorg src gnome org>]

commit e2cd83703cdc430f42b498f839ea6bb002754386
Author: Jens Georg <mail jensge org>
Date:   Tue Feb 26 15:26:45 2019 +0100

    flatpak: Temporarily downgrade SDK
    
    Clutter-GTK does not work on X11 with master SDK. Revert to 3.30 SDK
    where it still works.

 flatpak/org.gnome.Shotwell.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/flatpak/org.gnome.Shotwell.json b/flatpak/org.gnome.Shotwell.json
index 11ce0b21..fe76a55a 100644
--- a/flatpak/org.gnome.Shotwell.json
+++ b/flatpak/org.gnome.Shotwell.json
@@ -1,7 +1,7 @@
 {
     "app-id" : "org.gnome.Shotwell",
     "runtime" : "org.gnome.Platform",
-    "runtime-version" : "master",
+    "runtime-version" : "3.30",
     "sdk" : "org.gnome.Sdk",
     "command" : "shotwell",
     "tags" : [
@@ -17,6 +17,7 @@
         "--share=ipc",
         "--share=network",
         "--device=all",
+        "--device=dri",
         "--socket=wayland",
         "--socket=x11",
         "--talk-name=ca.desrt.dconf",