RFR: 8201450: Provide access to LogHandle tagset

[Kim Barrett]

> On Apr 12, 2018, at 3:07 PM, Stefan Karlsson <stefan.karlsson at oracle.com> wrote:
> 
> Looks good, and trivial.

Thanks.

> StefanK
> 
> On 2018-04-12 20:59, Kim Barrett wrote:
>> Please review this small addition to the LogHandle API, providing
>> access to its _tagset member. This supports constructing a
>> LogStream from a log level and a LogHandle, among other things.
>> 
>> CR:
>> https://bugs.openjdk.java.net/browse/JDK-8201450
>> 
>> Webrev:
>> http://cr.openjdk.java.net/~kbarrett/8201450/open.00/
>> 
>> Testing:
>> Built on on Oracle supported platforms, hs-tier1.