git: openjdk/loom: fibers: Set UseChunkBitmaps ergonomically, depending on GC

[duke]

Changeset: 235cd604
Author:    Ron Pressler <ron.pressler at oracle.com>
Date:      2021-09-29 13:54:52 +0000
URL:       https://git.openjdk.java.net/loom/commit/235cd6048e581dca87e45aa937a255041def5d82

Set UseChunkBitmaps ergonomically, depending on GC

! src/hotspot/share/runtime/arguments.cpp
! src/hotspot/share/runtime/arguments.hpp