[arch-general] usermove update

[Tom Gundersen]

Hi guys,

The recent updates of kmod, systemd and udev in testing moves
/lib/{systemd,udev,modprobe.d,depmod.d} to /usr/. The old location
will, for the time being, continue to work for config files (as well
as udev rules and systemd unit files).

However, helper programs installed to /lib/{systemd,udev} will have to
be moved to /usr/lib. This has been done for all the official
packages, but third-party packages will have to be updated.

Cheers,

Tom