hg: jdk9/hs-gc/hotspot: 8036698: Add trace event for updates to metaspace gc threshold

[erik.helin at oracle.com]

Changeset: 8f89500c1291
Author:    ehelin
Date:      2014-03-17 20:59 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-gc/hotspot/rev/8f89500c1291

8036698: Add trace event for updates to metaspace gc threshold
Reviewed-by: stefank, mgerdin

! src/share/vm/memory/metaspace.cpp
! src/share/vm/memory/metaspace.hpp
+ src/share/vm/memory/metaspaceGCThresholdUpdater.hpp
+ src/share/vm/memory/metaspaceTracer.cpp
+ src/share/vm/memory/metaspaceTracer.hpp
! src/share/vm/trace/trace.xml
! src/share/vm/trace/tracetypes.xml