In some udev rules files such as 97-hid2hci.rules from bluez5, it calls
/sbin/udevadm in a rule. eudev provides /usr/bin/udevadm and
/sbin/udevadm which is a link to /usr/bin/udevadm. But systemd only
provides /bin/udevadm. It is not convenient to update the rule file that
udevadm reside in different directories for eudev and system.
So create link file ${base_sbindir}/udevadm in systemd just the same as
eudev to fix such kind of issues.
Signed-off-by: Kai Kang <kai.kang@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>