RFR: JDK8u: Add compatibility with -verbose:gc and -XX+TraceGenNTime GC options for logging

[Aleksey Shipilev]

On 02/14/2017 03:55 PM, Roman Kennke wrote:
> This makes Shenandoah in JDK8u pick up -verbose:gc and
> -XX:+TraceGen0Time and -XX:+TraceGen1Time. The first prints information
> for each GC phase, the latter two print the stats summary at the end.
> We also print the summary for -verbose:gc. Ok to push?
> 
> http://cr.openjdk.java.net/~rkennke/jdk8u-logging/webrev.00/

OK.

-Aleksey