git: openjdk/loom: fibers: Invoke GC barriers when thawing from an old chunk

[duke]

Changeset: 003e50a4
Author:    Ron Pressler <ron.pressler at oracle.com>
Date:      2020-11-25 15:35:18 +0000
URL:       https://github.com/openjdk/loom/commit/003e50a4

Invoke GC barriers when thawing from an old chunk

! src/hotspot/cpu/x86/continuation_x86.inline.hpp
! src/hotspot/share/runtime/continuation.cpp