git: openjdk/loom: fibers: Stress vthreads test fixed to use graal.

[duke]

Changeset: 0a68b982
Author:    lmesnik <leonid.mesnik at oracle.com>
Date:      2020-09-28 12:24:29 +0000
URL:       https://git.openjdk.java.net/loom/commit/0a68b982

Stress vthreads test fixed to use graal.

! test/jdk/java/lang/Thread/virtual/stress/GetStackTraceALot.java
! test/jdk/java/lang/Thread/virtual/stress/PinALot.java
! test/jdk/java/lang/Thread/virtual/stress/PingPong.java
! test/jdk/java/lang/Thread/virtual/stress/SleepALot.java
! test/jdk/java/lang/Thread/virtual/stress/TimedGet.java
! test/jdk/java/lang/Thread/virtual/stress/YieldALot.java