test update: what we want to detect in this test is if the slave stopped.

mysql-test/r/rpl_trunc_binlog.result

@@ -8,7 +8,3 @@ stop slave;
 flush logs;
 reset slave;
 start slave;
-show slave status;
-Master_Host	Master_User	Master_Port	Connect_retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_do_db	Replicate_ignore_db	Last_errno	Last_error	Skip_counter	Exec_master_log_pos	Relay_log_space
-127.0.0.1	root	MASTER_PORT	1	master-bin.002	4	slave-relay-bin.002	161	master-bin.001	Yes	No			0	Rolling back unfinished transaction (no COMMIT or ROLLBACK) from relay log. Probably cause is that the master died while writing the transaction to it's binary log.	0	79	317
-reset master;

mysql-test/t/rpl_trunc_binlog.test

@@ -20,5 +20,4 @@ reset slave;
 start slave;
 # can't sync_with_master so we must sleep
 sleep 3;
---replace_result $MASTER_MYPORT MASTER_PORT
-show slave status;
+wait_for_slave_to_stop;