[pitivi] flatpak: Grant access to the DRI

[Thibault Saunier <tsaunier src gnome org>]

commit 5845f784575a096f7954d9c5d2842f9f05b4cf14
Author: Thibault Saunier <tsaunier gnome org>
Date:   Thu Aug 10 18:00:14 2017 -0400

    flatpak: Grant access to the DRI
    
    Mandatory for vaapi plugins

 build/flatpak/pitivi-flatpak       |    2 +-
 build/flatpak/pitivi.template.json |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/build/flatpak/pitivi-flatpak b/build/flatpak/pitivi-flatpak
index 8d7f6ba..8a19c5e 100755
--- a/build/flatpak/pitivi-flatpak
+++ b/build/flatpak/pitivi-flatpak
@@ -558,7 +558,7 @@ class PitiviFlatpak:  # pylint: disable=too-many-instance-attributes
                            "--socket=session-bus", "--socket=pulseaudio",
                            "--share=network", "--env=PITIVI_DEVELOPMENT=1",
                            "--env=CC=ccache gcc",
-                           "--env=CXX=ccache g++"]
+                           "--env=CXX=ccache g++", "--device=dri"]
 
         # The forwarded environment variables.
         forwarded = {}
diff --git a/build/flatpak/pitivi.template.json b/build/flatpak/pitivi.template.json
index b4173a5..60e9b5e 100644
--- a/build/flatpak/pitivi.template.json
+++ b/build/flatpak/pitivi.template.json
@@ -7,7 +7,7 @@
                     "--share=ipc", "--socket=x11", "--socket=session-bus", "--socket=pulseaudio",
                     "--talk-name=ca.desrt.dconf",
                     "--talk-name=org.freedesktop.Notifications",
-                    "--filesystem=host"],
+                    "--filesystem=host", "--device=dri"],
     "sdk": "org.gnome.Sdk",
     "rename-appdata-file": "pitivi.appdata.xml",
     "rename-desktop-file": "pitivi.desktop",