MariaRocks port: update result for rocksdb.type_char_indexes (see MDEV-11172)

storage/rocksdb/mysql-test/rocksdb/r/type_char_indexes.result

@@ -45,7 +45,7 @@ t1	1	v16	1	v16	A	500	NULL	NULL	YES	LSMTREE
 INSERT INTO t1 (c,c20,v16,v128,pk) VALUES ('a','char1','varchar1a','varchar1b','1'),('a','char2','varchar2a','varchar2b','2'),('b','char3','varchar1a','varchar1b','3'),('c','char4','varchar3a','varchar3b','4');
 EXPLAIN SELECT SUBSTRING(v16,0,3) FROM t1 WHERE v16 LIKE 'varchar%';
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index	v16	v16	19	NULL	#	Using where; Using index
+1	SIMPLE	t1	index	v16	v16	21	NULL	#	Using where; Using index
 SELECT SUBSTRING(v16,7,3) FROM t1 WHERE v16 LIKE 'varchar%';
 SUBSTRING(v16,7,3)
 r1a