corrected error in IronJS.Tests project file
corrected error in IronJS.Tests project file

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