RFR(s): 8148219: Add decorator hostname to UL

[Robbin Ehn]

Hi, please review this v2.

Update according David's comments, except os::get_host_name which needs 
to be moved from private scope.

New webrev: http://cr.openjdk.java.net/~mlarsson/rehn/8148219.v2/

And manually re-tested.

Thanks!

/Robbin

On 02/12/2016 01:16 PM, Robbin Ehn wrote:
> Hi, please review.
>
> This adds a new decorator for hostname to UL, with minor changes to
> os::get_host_name and UL init.
>
> JBS: https://bugs.openjdk.java.net/browse/JDK-8148219
> Webrev: http://cr.openjdk.java.net/~mlarsson/rehn/8148219/
>
> Manual tested and verified no change to hs_err_pid (uses
> os::get_host_name when fastdebug build) and that UL prints hostname.
>
> Thanks!
>
> /Robbin