fix(runtime): ship libva-drm2 and libva-x11-2 so DroidDeck-Proton's video demuxer loads
DroidDeck-Proton's ffmpeg links libva-drm and libva-x11. The runtime only had libva2, so winedmo.so failed to load and Media Foundation video stopped: Resident Evil Revelations hung on its loading screen with "Failed to create demuxer, status 0xc000007a", and RE engine and Kingdom Hearts cutscenes broke. Installing the desktop hid it because Plasma pulls both in.