Merge "Enable device=dri to fix opengl crashes" into flatpak-manifest.in

...from <https://github.com/flathub/org.libreoffice.LibreOffice/pull/18/commits/
637788fa1d9fc6514467a4a193e5cf32f696b400> "Enable device=dri to fix opengl
crashes"

Change-Id: Ic989bfb3e46057dc2fd20d2cd6f17d5733338642

solenv/flatpak-manifest.in

@@ -561,6 +561,7 @@
         "--socket=x11",
         "--socket=wayland",
         "--socket=pulseaudio",
+        "--device=dri",
         "--filesystem=host",
         "--env=DCONF_USER_CONFIG_DIR=.config/dconf",
         "--env=LIBO_FLATPAK=1",