Build fail: interface MemoryAddressProxy not exported

[Ty Young]

Hi,


Current foreign-jextract builds fail with:


/home/ty/Downloads/panama-foreign-foreign-jextract2/src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/MemoryAddressImpl.java:41: 
warning: [exports] interface MemoryAddressProxy in module java.base may 
not be visible to all clients that require this module
public final class MemoryAddressImpl implements MemoryAddress, 
MemoryAddressProxy {


MemoryAddressProxy isn't even used in public API besides VarHandle get() 
and set() methods(even then, it's not transparent) so I'm assuming this 
is being leaked in error.