git: openjdk/loom: fibers: Add JFR tests for virtual threads

[duke]

Changeset: 2c38cee3
Author:    Erik <erik.gahlin at oracle.com>
Date:      2020-03-13 17:12:21 +0000
URL:       https://git.openjdk.java.net/loom/commit/2c38cee3

Add JFR tests for virtual threads

! test/jdk/jdk/jfr/api/consumer/TestRecordedEventGetThread.java
! test/jdk/jdk/jfr/api/consumer/TestRecordedEventGetThreadOther.java
+ test/jdk/jdk/jfr/threading/TestDeepVirtualStackTrace.java
+ test/jdk/jdk/jfr/threading/TestManyVirtualThreads.java
+ test/jdk/jdk/jfr/threading/TestNestedVirtualThreads.java