git: openjdk/loom: fibers: 2 new changesets

[duke]

Changeset: c2909b4e
Author:    Alan Bateman <alan.bateman at oracle.com>
Date:      2021-01-14 08:11:58 +0000
URL:       https://git.openjdk.java.net/loom/commit/c2909b4e

Apply JDk-8259021 to SharedSecrets changes

! src/java.base/share/classes/jdk/internal/access/SharedSecrets.java

Changeset: 74aec51b
Author:    Alan Bateman <alan.bateman at oracle.com>
Date:      2021-01-17 08:15:55 +0000
URL:       https://git.openjdk.java.net/loom/commit/74aec51b

getUEH should return null after termination, clear refs vthread's TL maps after termination

! src/java.base/share/classes/java/lang/Thread.java
! src/java.base/share/classes/java/lang/VirtualThread.java
! test/jdk/java/lang/Thread/virtual/ThreadAPI.java