sysmobts: Use a newline at the end of the SACCH u8Size < 2 message
sysmobts: Use a newline at the end of the SACCH u8Size < 2 message

The other message in this method is using a \n as well and the line
is generally now followed with a LOGPC.

It looked like this:
<0006> l1_if.c:672 SACCH with size 0<2 !?!<0006> tch.c:540 (bts=0,trx=0,ts=2,ss=0) Rx Payload size 0

telenoobie/osmo-bts,osmocom/osmo-bts,telenoobie/osmo-bts,telenoobie/osmo-bts,shimaore/osmo-bts,shimaore/osmo-bts,osmocom/osmo-bts,geosphere/osmo-bts,geosphere/osmo-bts,osmocom/osmo-bts,geosphere/osmo-bts,shimaore/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,shimaore/osmo-bts