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

[maurizio.cimadamore at oracle.com]

Changeset: d7bea399075c
Author:    mcimadamore
Date:      2020-01-28 13:31 +0000
URL:       https://hg.openjdk.java.net/panama/dev/rev/d7bea399075c

8237899: Add support for scoped allocation
Reviewed-by: jvernee, sundar
Changes:
* Made AllocationScope::sp private
* fix spurious alignment in copyright header in TestAllocationScope

! src/jdk.incubator.foreign/share/classes/jdk/incubator/foreign/AllocationScope.java