hg: jdk/sandbox: 8212988: add recent class unloading events to the hs_err log

[chris.hegarty at oracle.com]

Changeset: 7f3b27d9c22d
Author:    coleenp
Date:      2019-02-13 06:48 -0500
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/7f3b27d9c22d

8212988: add recent class unloading events to the hs_err log
Summary: also moved class unloading logging in expected place.
Reviewed-by: never, stuefe

! src/hotspot/share/oops/instanceKlass.cpp
! src/hotspot/share/services/classLoadingService.cpp
! src/hotspot/share/utilities/events.cpp
! src/hotspot/share/utilities/events.hpp