Code review comment for ~b-stolk/chromium-browser/+git/snap-from-source:fix-expansion

I've submitted two builds, one using this merge request and another using mesa-va-drivers path instead. If the latter works I think we should prefer it.

Edit: For the record, I was conflating radeon_dri.so and radeonsi_drv_video.so. So yes we'll go with the one in gnome-platform.