git: openjdk/loom: fibers: More test excluded.

[duke]

Changeset: c2e44131
Author:    lmesnik <leonid.mesnik at oracle.com>
Date:      2020-09-24 20:35:49 +0000
URL:       https://git.openjdk.java.net/loom/commit/c2e44131

More test excluded.

! test/hotspot/jtreg/ProblemList-vthread.txt