Fetch 20-net-ifname.hwdb from upstream repository. Add both 20-net-ifname.hwdb and earlier 60-keyboard.hwdb
to the date generation -line. Assuming it's the correct action to do?
Main point of this commit is to include the 20-net-ifname.hwdb for >=sys-fs/udev-209 and >=sys-apps/systemd-209.