fix: when hooking a constructor with Frida, call $new instead of `$…

[Areizen]

Description

Fix the javascript generated by Frida action that, in case of a constructor, generate a call to $init instead of $new to instantiate the object.

[skylot]

@Areizen thanks!
Do I understand correctly that $init is also work, but $new is just more correct (i.e. create object instead of hooking constructor)?

[Areizen]

In fact $init cannot be called, it result in an error. It is only used as a keyword to hook the constructor. The method that can be used to instantiate an object is another keyword $new which can be called (but not hooked).