[foreign] annotation refactoring towards the spec

[Henry Jen]

Looks good to me.

Cheers,
Henry

> On May 23, 2018, at 7:28 AM, Sundararajan Athijegannathan <sundararajan.athijegannathan at oracle.com> wrote:
> 
> Refactoring annotations towards specification: http://cr.openjdk.java.net/~mcimadamore/panama/panama-binder-v3.html
> 
> * NativeCallback annotation for callback Functional interfaces.
> * NativeStruct annotation for structs/union
> * removed CallingConvention.java - which is unused in binder
> * renamed "C" to be NativeLocation - to be consistent with other annotation names
> * Binder picks up struct layout from NativeCallback, NativeStruct (and not from NativeType on functional interface method or struct interface)
> * NativeHeader has "declarations" attribute that has all descriptions collected in one place.
> * removed unused "size" attribute in NativeType.
> 
> Webrev: http://cr.openjdk.java.net/~sundar/annotation_refactoring/webrev.00/index.html
> 
> Thanks,
> -Sundar