git: openjdk/loom: fibers: add new test RawMonitorTest for raw monitors on virtual threads

[duke]

Changeset: 3dee6746
Author:    Serguei Spitsyn <serguei.spitsyn at oracle.com>
Date:      2021-06-04 05:08:34 +0000
URL:       https://git.openjdk.java.net/loom/commit/3dee6746a215ddc98a7756168dfdb51c2015a6ae

add new test RawMonitorTest for raw monitors on virtual threads

+ test/hotspot/jtreg/serviceability/jvmti/vthread/RawMonitorTest/RawMonitorTest.java
+ test/hotspot/jtreg/serviceability/jvmti/vthread/RawMonitorTest/libRawMonitorTest.cpp