Require explicit version-release of chromium-libs from media-freeworld
    
    Since the freeworld package is built in another repository,
    it may be out of sync. This makes sure `dnf update` won't just
    remove the installed version of chromium in order to update
    chromium-libs-media-freeworld if that happens to be in the repo
    sooner than chromium.
    
    Reported as #4572 in that other repository.