RFR: Small change to logging to make -Xlog:gc behave better.

[Roman Kennke]

Am Freitag, den 21.10.2016, 10:22 -0400 schrieb Christine Flood:
> I changed the behavior slightly so that -Xlog:gc now 
> reports:
> 
>    init mark pause times
>    final mark pause times
>    concurrent marking times
>    concurrent evacuation times
>    and when concurrent gc is canceled. 
> 
> 
> http://cr.openjdk.java.net/~chf/BetterLogging/webrev.00/

Very good! Please push!

Roman