Adjust the result for join_cache.test

mysql-test/main/join_cache.result

@@ -5197,7 +5197,7 @@ SELECT * FROM (SELECT DISTINCT * FROM t1) t
 WHERE t.a IN (SELECT t2.a FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where; Start temporary
-1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	2	End temporary
+1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	1	End temporary
 2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	3	Using temporary
 SELECT * FROM (SELECT DISTINCT * FROM t1) t
 WHERE t.a IN (SELECT t2.a FROM t2);
@@ -5208,8 +5208,8 @@ EXPLAIN
 SELECT * FROM (SELECT DISTINCT * FROM t1) t
 WHERE t.a  IN (SELECT t2.a FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	
-1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where; Start temporary
+1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	1	End temporary
 2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	3	Using temporary
 SELECT * FROM (SELECT DISTINCT * FROM t1) t
 WHERE t.a  IN (SELECT t2.a FROM t2);