git: openjdk/mobile: 8242400: Shenandoah: Restore logging to pre-jdk8241984 format

[duke]

Changeset: 13645057
Author:    Zhengyu Gu <zgu at openjdk.org>
Date:      2020-04-09 08:43:03 +0000
URL:       https://git.openjdk.java.net/mobile/commit/13645057

8242400: Shenandoah: Restore logging to pre-jdk8241984 format

Reviewed-by: shade

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! src/hotspot/share/gc/shenandoah/shenandoahUtils.cpp
! src/hotspot/share/gc/shenandoah/shenandoahUtils.hpp