Lokkup.find* do not add read edges like reflection does

[Remi Forax]

Hi all,
when using Method.invoke, we automatically add a read edge between the current class and the called class when invoking a method by reflection but if one uses methods lookup.find*,
he had to add the read edge manually. I think we should harmonize the behavior and add a read edge when using java.lang.invoke API too.

cheers,
Rémi