Fixed path in logrotate config file for Kamailio

It should now follow this: https://github.com/2600hz/kazoo_configs/blob/master/system/rsyslog.d/10-kamailio.conf

as described here: https://github.com/2600hz/kazoo_configs/commit/7bb84dc86b46b2c2c78e4a645ef0107e04434c12