buildroot

chrony: systemd support

systemd has its own NTP daemon, which must be disabled before
starting chrony. Possible (but unlikely) conflict with openntpd
is not marked in either package.

Signed-off-by: Alex Suykov <alex.suykov@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>