git: openjdk/loom: fibers: Get jtreg main wrapper working again

[duke]

Changeset: 053aa40a
Author:    Alan Bateman <alan.bateman at oracle.com>
Date:      2020-04-12 08:17:08 +0000
URL:       https://git.openjdk.java.net/loom/commit/053aa40a

Get jtreg main wrapper working again

! make/autoconf/spec.gmk.in