Added unti test for instanceof operator
Added unti test for instanceof operator

hnafar/IronJS,fholm/IronJS,hnafar/IronJS,xamarin/IronJS,hnafar/IronJS,hnafar/IronJS,hnafar/IronJS,xamarin/IronJS,fholm/IronJS,xamarin/IronJS,fholm/IronJS,fholm/IronJS,xamarin/IronJS