8202052: Disable warnings when building libawt with VS2017
Reviewed-by: erikj, prr
check with loadWithNewGlobal
obj.x 344
obj.y 12
obj instanceof global.Point? true
p.x 343
p.y 54
p instanceof P? true
check with script engine
obj.x 344
obj.y 12
obj instanceof global.Point? true
p.x 343
p.y 54
p instanceof P? true