A follow up fix for MDEV-5528

(forgot to do "git add" for two files in the previous commit for MDEV-5528)

mysql-test/suite/innodb/r/innodb_mysql.result

@@ -694,7 +694,7 @@ EXPLAIN
 SELECT COUNT(*) FROM t1 FORCE INDEX(idx_b, idx_c) 
 WHERE (c >= '2007-01-02' AND c <= '2007-01-03') OR b >= 1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index_merge	idx_b,idx_c	idx_c,idx_b	8,4	NULL	#	Using sort_union(idx_c,idx_b); Using where
+1	SIMPLE	t1	index_merge	idx_b,idx_c	idx_c,idx_b	5,4	NULL	#	Using sort_union(idx_c,idx_b); Using where
 SELECT COUNT(*) FROM t1 FORCE INDEX(idx_b, idx_c)
 WHERE (c >= '2007-01-02' AND c <= '2007-01-03') OR b >= 1;
 COUNT(*)

storage/xtradb/dict/dict0stats.cc

@@ -194,7 +194,7 @@ dict_stats_persistent_storage_check(
 		{"table_name", DATA_VARMYSQL,
 			DATA_NOT_NULL, 192},
 
-		{"last_update", DATA_INT,
+		{"last_update", DATA_FIXBINARY,
 			DATA_NOT_NULL, 4},
 
 		{"n_rows", DATA_INT,
@@ -225,7 +225,7 @@ dict_stats_persistent_storage_check(
 		{"index_name", DATA_VARMYSQL,
 			DATA_NOT_NULL, 192},
 
-		{"last_update", DATA_INT,
+		{"last_update", DATA_FIXBINARY,
 			DATA_NOT_NULL, 4},
 
 		{"stat_name", DATA_VARMYSQL,