bts: Add RLL tests

This adds a series of test cases to BTS_Tests.ttcn implementing testing
of the RLL sub-layr of RSL, i.e. the translation between LAPDm frames
on the Um interface and the RLL frames on the Abis side (and vice vrsa).

Related: OS#3174
Change-Id: I336378de6106e5369600cbb49e0c47cc59864630
diff --git a/library/L1CTL_PortType.ttcn b/library/L1CTL_PortType.ttcn
index 77b2494..f8bc670 100644
--- a/library/L1CTL_PortType.ttcn
+++ b/library/L1CTL_PortType.ttcn
@@ -97,7 +97,7 @@
 		alt {
 			[] pt.receive(tr_L1CTL_DATA_IND(t_RslChanNr_PCH_AGCH(0))) -> value dl {
 				rr := dec_GsmRrMessage(dl.payload.data_ind.payload);
-				log("PCH/AGCN DL RR: ", rr);
+				log("PCH/AGCH DL RR: ", rr);
 				if (match(rr, t_RR_IMM_ASS(ra, rach_fn))) {
 					log("Received IMM.ASS for our RACH!");
 				} else {