git: openjdk/loom: fibers: ProblemList-vthread.txt updated.

[duke]

Changeset: 875e8418
Author:    lmesnik <leonid.mesnik at oracle.com>
Date:      2021-08-17 16:03:50 +0000
URL:       https://git.openjdk.java.net/loom/commit/875e84181559d97851feb499e31be64ae68107c9

ProblemList-vthread.txt updated.

! test/jdk/ProblemList-vthread.txt