hg: jdk/submit: 8241001: Improve logging in the ConcurrentGCBreakpoint mechanism

[kim.barrett at oracle.com]

Changeset: d2bee277e572
Author:    kbarrett
Date:      2020-03-20 01:20 -0400
URL:       https://hg.openjdk.java.net/jdk/submit/rev/d2bee277e572

8241001: Improve logging in the ConcurrentGCBreakpoint mechanism
Summary: Demoted most breakpoint logging to trace level.
Reviewed-by: pliden, sjohanss

! src/hotspot/share/gc/shared/concurrentGCBreakpoints.cpp
! src/hotspot/share/logging/logPrefix.hpp