systemd: start criu-service with log at /var/log

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Acked-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
install: install criu-service logrotate config

Thank Vladimir Davydov <vdavidov@parallels.com> for help and config.

Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Acked-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>