bsc: Test that ETWS Primary Notification is passed via RSL to PCH

The BSC must not only pass the ETWS Primary Notification from CBSP
down every dedicated channel, but it must also send it via an
Osmocom-specific RSL message to enable the BTS to brodcast it via
the PCH (P1 Rest Octets) and pass it to the PCU for PACCH.

Change-Id: Ia418095844aaa418a4e2ff6fd75d8a4b3c8bb9c0
Related: #4046
1 file changed