hg: panama/dev: 8218669: Flatten Reference hierarchy

[maurizio.cimadamore at oracle.com]

Changeset: 92ed0f977cb6
Author:    mcimadamore
Date:      2019-02-11 13:05 +0000
URL:       http://hg.openjdk.java.net/panama/dev/rev/92ed0f977cb6

8218669: Flatten Reference hierarchy
Reviewed-by: sundar

! src/java.base/share/classes/jdk/internal/foreign/memory/LayoutTypeImpl.java
- src/java.base/share/classes/jdk/internal/foreign/memory/Reference.java
! src/java.base/share/classes/jdk/internal/foreign/memory/References.java