git: openjdk/mobile: 8235260: Shenandoah: Don't allow recycle-assist until concurrent roots are done

[duke]

Changeset: 3e0a5245
Author:    Roman Kennke <rkennke at openjdk.org>
Date:      2019-12-03 21:23:27 +0000
URL:       https://git.openjdk.java.net/mobile/commit/3e0a5245

8235260: Shenandoah: Don't allow recycle-assist until concurrent roots are done

Reviewed-by: zgu

! src/hotspot/share/gc/shenandoah/shenandoahFreeSet.cpp
! src/hotspot/share/gc/shenandoah/shenandoahFreeSet.hpp