[devhelp] flatpak: Add OpenGL access for WebkitGtk

[Patrick Griffis <pgriffis src gnome org>]

commit 0af7b60f0df9ba3e50b2812bfa248bd0ad242082
Author: Patrick Griffis <tingping tingping se>
Date:   Sun Feb 25 20:13:08 2018 -0500

    flatpak: Add OpenGL access for WebkitGtk

 flatpak/org.gnome.Devhelp.json |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/flatpak/org.gnome.Devhelp.json b/flatpak/org.gnome.Devhelp.json
index 5984b56..abd6771 100644
--- a/flatpak/org.gnome.Devhelp.json
+++ b/flatpak/org.gnome.Devhelp.json
@@ -12,6 +12,8 @@
         "--share=ipc", "--socket=x11",
         /* Wayland access */
         "--socket=wayland",
+        /* OpenGL for Webkit */
+        "--device=dri",
         /* We want full fs access to see the API docs installed by traditional
          * Linux distro packages.
          */