Modified `normalizeVal` to use a literal TaggedBool if it is passed a constant bool expression.
Modified `normalizeVal` to use a literal TaggedBool if it is passed a constant bool expression.

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