hg: jdk/jdk: 8197425: Liveset information for Old Object sample event

[markus.gronlund at oracle.com]

Changeset: e1117321adaf
Author:    egahlin
Date:      2018-06-28 15:13 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/e1117321adaf

8197425: Liveset information for Old Object sample event
Reviewed-by: mgronlun, ehelin

! src/hotspot/share/jfr/leakprofiler/emitEventOperation.cpp
! src/hotspot/share/jfr/leakprofiler/sampling/objectSample.hpp
! src/hotspot/share/jfr/leakprofiler/sampling/objectSampler.cpp
! src/hotspot/share/jfr/metadata/metadata.xml
+ test/jdk/jdk/jfr/event/oldobject/TestLastKnownHeapUsage.java