git: openjdk/loom: fibers: 2 new changesets

[duke]

Changeset: 1f0a0ecf
Author:    Ron Pressler <ron.pressler at oracle.com>
Date:      2022-03-15 16:09:23 +0000
URL:       https://git.openjdk.java.net/loom/commit/1f0a0ecf4ce8ba870a43fb57c9b57399eed0fbc7

Add a comment explaining CONT_JFR

! src/hotspot/share/runtime/continuation.cpp

Changeset: b03e5cda
Author:    Ron Pressler <ron.pressler at oracle.com>
Date:      2022-03-15 16:09:59 +0000
URL:       https://git.openjdk.java.net/loom/commit/b03e5cda6340dec68c3e613e5096e6a134d1c714

Fix barriers on preemption

! src/hotspot/share/runtime/continuation.cpp