Portability fix (bug #7203: "delayed" test fails on QNX when using prepared statements)

mysql-test/t/delayed.test:
  Portability fix (bug #7203: "delayed" test fails on QNX when using prepared statements)
  1 is not enough delay for QNX.

mysql-test/t/delayed.test

@@ -14,7 +14,7 @@ insert delayed into t1 set a = 4;
 insert delayed into t1 set a = 5, tmsp = 19711006010203;
 insert delayed into t1 (a, tmsp) values (6, 19711006010203);
 insert delayed into t1 (a, tmsp) values (7, NULL);
---sleep 1
+--sleep 2
 insert into t1 set a = 8,tmsp=19711006010203;
 select * from t1 where tmsp=0;
 select * from t1 where tmsp=19711006010203;