f_rach_toffs: Print toffs256 value in verdict when failing

Change-Id: I82a8f7c8dd3ce3327aa43bfb9f03795531718320
diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 890c216..83688b9 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -648,7 +648,7 @@
 		setverdict(pass);
 		}
 	[not expect_pass] RSL_CCHAN.receive(tr_RSL_UD(tr_RSL_CHAN_RQD(ra, fn))) {
-		setverdict(fail, "RACH passed but was expected to be dropped");
+		setverdict(fail, "RACH passed but was expected to be dropped: ", toffs256);
 		}
 	[] RSL_CCHAN.receive { repeat; }
 	[not expect_pass] T.timeout {