[foreign] RFR 8218992: Remove Scope.Resource interface

[Maurizio Cimadamore]

As the subject implies, the Scope.Resource interface does not carry 
enough weight, and should therefore be removed (at least until we start 
to see other kinds of interesting resources).

Pointers are the only real resource managed by scopes - arrays, structs 
and callbacks are just views on pointers with extra capabilities added 
on top. Clients lose almost nothing with this - since there's always a 
way to go from the view to the pointer that backs it up.

http://cr.openjdk.java.net/~mcimadamore/panama/8218992/

Maurizio