java/lang/ThreadGroup/Stop.java
test may fail with java.lang.LinkageError, intermittently.

This starts happening since JDK9 build 129.
With 9/b128, 9/b127 and 9/b125, 50,000 times of run, all pass
With 9/b129, 8 (out of the total 50,000) times failed with following error.

Exception in thread "Thread-0" java.lang.LinkageError
        at java.lang.invoke.MethodHandleNatives.linkMethodImpl(java.base@9-ea/MethodHandleNatives.java:386)
        at java.lang.invoke.MethodHandleNatives.linkMethod(java.base@9-ea/MethodHandleNatives.java:366)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$Node.compareAndSetWaitStatus(java.base@9-ea/AbstractQueuedSynchronizer.java:521)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.doReleaseShared(java.base@9-ea/AbstractQueuedSynchronizer.java:727)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer.releaseShared(java.base@9-ea/AbstractQueuedSynchronizer.java:1369)
        at java.util.concurrent.CountDownLatch.countDown(java.base@9-ea/CountDownLatch.java:292)
        at Stop.lambda$main$0(Stop.java:40)
        at java.lang.Thread.run(java.base@9-ea/Thread.java:843)
Caused by: java.lang.ThreadDeath
        at java.lang.Thread.stop(java.base@9-ea/Thread.java:948)
        at java.lang.ThreadGroup.stopOrSuspend(java.base@9-ea/ThreadGroup.java:698)
        at java.lang.ThreadGroup.stop(java.base@9-ea/ThreadGroup.java:610)
        at Stop.lambda$main$1(Stop.java:56)
        ... 1 more