git: openjdk/loom: fibers: Properly fix 8283586. Real issue was a race condition when incrementing a counter.

[duke]

Changeset: 1711c74f
Author:    Chris Plummer <chris.plummer at oracle.com>
Date:      2022-03-30 18:09:28 +0000
URL:       https://git.openjdk.java.net/loom/commit/1711c74fa7c0bff0f98aaaa76dbfee0af2d9dc6d

Properly fix 8283586. Real issue was a race condition when incrementing a counter.

! test/hotspot/jtreg/vmTestbase/nsk/jdb/kill/kill001/kill001a.java