RFR: Improve/more detailed timing stats for Traversal GC

[Aleksey Shipilev]

On 02/02/2018 04:16 PM, Roman Kennke wrote:
> Differential:
> http://cr.openjdk.java.net/~rkennke/traversal-stats/webrev.01.diff/
> Full:
> http://cr.openjdk.java.net/~rkennke/traversal-stats/webrev.01/

Yup.

-Aleksey