git: openjdk/loom: fibers: restored line removed by mistake in test jvmti/thread/GetFrameCount/framecnt01/

[duke]

Changeset: b2728edf
Author:    Serguei Spitsyn <serguei.spitsyn at oracle.com>
Date:      2021-12-24 01:35:18 +0000
URL:       https://git.openjdk.java.net/loom/commit/b2728edf46e4298ea9846d0c541cb87f4f28bd24

restored line removed by mistake in test jvmti/thread/GetFrameCount/framecnt01/

! test/hotspot/jtreg/serviceability/jvmti/thread/GetFrameCount/framecnt01/libframecnt01.cpp