MDEV-5349: Test main.subselect_sj_jcl6 fails sporadically due to insufficient ordering

- Add --sorted_result to the query

mysql-test/r/subselect_sj.result

@@ -2931,10 +2931,10 @@ CREATE TABLE t3 (c3 VARCHAR(1)) ENGINE=MyISAM;
 INSERT INTO t3 VALUES ('x'),('d');
 SELECT * FROM t1, t2 WHERE pk IN ( SELECT pk FROM t1 LEFT JOIN t3 ON (c1 = c3 ) ) ORDER BY c2, c1;
 pk	c1	c2
-4	NULL	x
-3	c	x
 1	v	x
 2	v	x
+3	c	x
+4	NULL	x
 5	x	x
 # This should show that "t1 left join t3" is still in the semi-join nest:
 EXPLAIN EXTENDED

mysql-test/r/subselect_sj_jcl6.result

@@ -2945,10 +2945,10 @@ CREATE TABLE t3 (c3 VARCHAR(1)) ENGINE=MyISAM;
 INSERT INTO t3 VALUES ('x'),('d');
 SELECT * FROM t1, t2 WHERE pk IN ( SELECT pk FROM t1 LEFT JOIN t3 ON (c1 = c3 ) ) ORDER BY c2, c1;
 pk	c1	c2
-4	NULL	x
-3	c	x
 1	v	x
 2	v	x
+3	c	x
+4	NULL	x
 5	x	x
 # This should show that "t1 left join t3" is still in the semi-join nest:
 EXPLAIN EXTENDED

mysql-test/t/subselect_sj.test

@@ -2634,6 +2634,7 @@ INSERT INTO t2 VALUES ('x');
 CREATE TABLE t3 (c3 VARCHAR(1)) ENGINE=MyISAM;
 INSERT INTO t3 VALUES ('x'),('d');
 
+--sorted_result
 SELECT * FROM t1, t2 WHERE pk IN ( SELECT pk FROM t1 LEFT JOIN t3 ON (c1 = c3 ) ) ORDER BY c2, c1;
 
 --echo # This should show that "t1 left join t3" is still in the semi-join nest: