git: openjdk/loom: fibers: Added vthreads support to NSK stress tests.

[duke]

Changeset: 648ed31c
Author:    lmesnik <leonid.mesnik at oracle.com>
Date:      2020-04-09 18:53:02 +0000
URL:       https://git.openjdk.java.net/loom/commit/648ed31c

Added vthreads support to NSK stress tests.

! test/hotspot/jtreg/vmTestbase/nsk/share/runner/RunParams.java
! test/hotspot/jtreg/vmTestbase/nsk/share/runner/ThreadsRunner.java