git: openjdk/loom: fibers: added temporary work around for JVMTI_ERROR_DUPLICATE in DoContinueSingleStepTest

[duke]

Changeset: ca53cfd9
Author:    Serguei Spitsyn <serguei.spitsyn at oracle.com>
Date:      2020-12-10 09:01:25 +0000
URL:       https://git.openjdk.java.net/loom/commit/ca53cfd9

added temporary work around for JVMTI_ERROR_DUPLICATE in DoContinueSingleStepTest

! test/hotspot/jtreg/serviceability/jvmti/vthread/DoContinueSingleStepTest/libDoContinueSingleStepTest.cpp