[date] Date parser says true even for wrong dates, check twice.

test/mjsunit/regress/regress-crbug-575082.js

Index: test/mjsunit/regress/regress-crbug-575082.js
diff --git a/test/message/arrow-bare-rest-param.js b/test/mjsunit/regress/regress-crbug-575082.js
similarity index 83%
copy from test/message/arrow-bare-rest-param.js
copy to test/mjsunit/regress/regress-crbug-575082.js
index b826ec20b79dcb4a7f3a53b4a85568f8b8089da7..d9cc0f914048354689ed49331d569cfbb1f9f8fd 100644
--- a/test/message/arrow-bare-rest-param.js
+++ b/test/mjsunit/regress/regress-crbug-575082.js
@@ -1,7 +1,5 @@
 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-//
-//
 
-...x => 10
+var y = new Date("-1073741824");