bsc: mark test start in OsmoBSC's logging output

Change-Id: I896a02403c9933323a9d7807a66be0afc4028d0f
diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 9a6cce3..fff5c2c 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -3164,6 +3164,8 @@
 	}
 	vc_conn := MSC_ConnHdlr.create(id);
 	f_connect_handler(vc_conn, bssap_idx);
+	/* Emit a marker to appear in the SUT's own logging output */
+	f_logp(BSCVTY, testcasename() & "() start");
 	vc_conn.start(f_handler_init(fn, id, pars));
 	return vc_conn;
 }