git: openjdk/loom: fibers: 2 new changesets

[duke]

Changeset: f7cac414
Author:    lmesnik <leonid.mesnik at oracle.com>
Date:      2021-05-04 13:37:27 +0000
URL:       https://git.openjdk.java.net/loom/commit/f7cac41486ee273b867aad5b0152d1a898c3464c

Test java/lang/Thread/virtual/ShutdownHook.java added

+ test/jdk/java/lang/Thread/virtual/ShutdownHook.java

Changeset: 90326405
Author:    lmesnik <leonid.mesnik at oracle.com>
Date:      2021-05-04 13:37:58 +0000
URL:       https://git.openjdk.java.net/loom/commit/90326405f9ff47a241da217b30317be20634fb17

Merge branch 'fibers' of https://github.com/openjdk/loom into fibers