RFR: Move some rarely called functions from ZStat.hpp to ZStat.cpp

[Erik Österlund]

Hi Per,

Looks good.

Thanks,
/Erik

On 2018-03-05 15:26, Per Liden wrote:
> Clean up patch which moves some rarely called functions from ZStat.hpp 
> to ZStat.cpp.
>
> http://cr.openjdk.java.net/~pliden/zgc/zstat_cleanup/webrev.0/
>
> /Per