[gnome-builder] flatpak: give access to session/system bus

[Christian Hergert <chergert src gnome org>]

commit be378021a70296ae315179898f1821ed9924ebd1
Author: Christian Hergert <chergert redhat com>
Date:   Fri May 10 09:44:35 2019 -0700

    flatpak: give access to session/system bus

 build-aux/flatpak/org.gnome.Builder.json | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index f1b8c079a..0025a3767 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -17,6 +17,8 @@
         "--socket=fallback-x11",
         "--socket=wayland",
         "--socket=ssh-auth",
+        "--socket=session-bus",
+        "--socket=system-bus",
         "--filesystem=home",
         "--filesystem=host",
         "--share=network",