hg: panama/dev: 8237899: Add support for scoped allocation

[maurizio.cimadamore at oracle.com]

Changeset: 56571d3a134e
Author:    mcimadamore
Date:      2020-01-28 12:58 +0000
URL:       https://hg.openjdk.java.net/panama/dev/rev/56571d3a134e

8237899: Add support for scoped allocation
Reviewed-by: jvernee

+ src/jdk.incubator.foreign/share/classes/jdk/incubator/foreign/AllocationScope.java
+ test/jdk/java/foreign/TestAllocationScope.java