Make MyRocks test stable: Data_length may vary slightly as well

storage/rocksdb/mysql-test/rocksdb_sys_vars/r/rocksdb_flush_memtable_on_analyze_basic.result

@@ -48,11 +48,11 @@ a	b
 3	3
 SHOW TABLE STATUS LIKE 't1';
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	ROCKSDB	10	Fixed	#	#	69	0	0	0	4	NULL	NULL	NULL	latin1_swedish_ci	NULL		
+t1	ROCKSDB	10	Fixed	#	#	#	0	0	0	4	NULL	NULL	NULL	latin1_swedish_ci	NULL		
 ANALYZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	analyze	status	OK
 SHOW TABLE STATUS LIKE 't1';
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	ROCKSDB	10	Fixed	#	#	24	0	0	0	4	NULL	NULL	NULL	latin1_swedish_ci	NULL		
+t1	ROCKSDB	10	Fixed	#	#	#	0	0	0	4	NULL	NULL	NULL	latin1_swedish_ci	NULL		
 DROP TABLE t1;

storage/rocksdb/mysql-test/rocksdb_sys_vars/t/rocksdb_flush_memtable_on_analyze_basic.test

@@ -37,10 +37,10 @@ INSERT INTO t1 (b) VALUES (3);
 --sorted_result
 SELECT * FROM t1;
 
---replace_column 5 # 6 #
+--replace_column 5 # 6 # 7 #
 SHOW TABLE STATUS LIKE 't1';
 ANALYZE TABLE t1;
---replace_column 5 # 6 #
+--replace_column 5 # 6 # 7 #
 SHOW TABLE STATUS LIKE 't1';
 
 DROP TABLE t1;