Add an end marker to a test

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

@@ -193,3 +193,4 @@ SELECT n_rows FROM mysql.innodb_table_stats WHERE TABLE_NAME="t1";
 n_rows
 4096
 DROP TABLE t1;
+# End of 10.6 tests

mysql-test/suite/innodb/t/insert_into_empty.test

@@ -206,3 +206,5 @@ where table_name="t1";
 source include/wait_condition.inc;
 SELECT n_rows FROM mysql.innodb_table_stats WHERE TABLE_NAME="t1";
 DROP TABLE t1;
+
+--echo # End of 10.6 tests