hg: jdk/sandbox: Print heap counters occasionally

[ashipile at redhat.com]

Changeset: 669f8c047c9c
Author:    shade
Date:      2017-12-08 13:45 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/669f8c047c9c

Print heap counters occasionally

! src/hotspot/share/gc/epsilon/epsilonHeap.cpp
! src/hotspot/share/gc/epsilon/epsilonHeap.hpp
! src/hotspot/share/gc/epsilon/epsilon_globals.hpp
+ test/hotspot/jtreg/gc/epsilon/TestPrintHeapSteps.java
+ test/hotspot/jtreg/gc/epsilon/TestUpdateCountersSteps.java