git: openjdk/loom: fibers: 3 new changesets

[duke]

Changeset: 8e4c0298
Author:    Alan Bateman <alan.bateman at oracle.com>
Date:      2022-03-14 12:11:55 +0000
URL:       https://git.openjdk.java.net/loom/commit/8e4c0298b61e1255b30a3f696f80706b1bfba4a2

Fixed build issue

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp

Changeset: 70a8ecce
Author:    Alan Bateman <alan.bateman at oracle.com>
Date:      2022-03-14 12:59:30 +0000
URL:       https://git.openjdk.java.net/loom/commit/70a8ecce86329e1b5c76c1fd4441eb4fb6fa7718

Spec clarification

! src/java.base/share/classes/java/lang/ThreadGroup.java

Changeset: 1f489c56
Author:    Alan Bateman <alan.bateman at oracle.com>
Date:      2022-03-14 15:47:12 +0000
URL:       https://git.openjdk.java.net/loom/commit/1f489c56c57ea19abbb1b468dfa04508e4469304

TG.list needs to allow for threads to terminate

! src/java.base/share/classes/java/lang/ThreadGroup.java