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

[duke]

Changeset: 860e7770
Author:    lmesnik <leonid.mesnik at oracle.com>
Date:      2020-10-19 12:25:05 +0000
URL:       https://git.openjdk.java.net/loom/commit/860e7770

More tests excluded.

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