RFR: Upstream merge from jdk/jdk

[zgu at redhat.com]

Good to me.

-Zhengyu

On Fri, 2018-12-14 at 15:36 +0100, Roman Kennke wrote:
> Let's merge the first jdk13 tag!
> 
> Notable news:
> - 8204947: Port ShenandoahTaskTerminator to mainline and make it
> default
> 
> and!
> 
> - 8214259: Implementation: JEP 189: Shenandoah: A Low-Pause-Time
> Garbage
> Collector (Experimental)
> 
> :-D
> 
> .. and a few related commits.
> 
> http://cr.openjdk.java.net/~rkennke/upstream-jdk13-merge-2018-12-14/o
> utgoing.txt
> 
> Testing: hotspot_gc_shenandoah
> 
> ok?
> 
> Roman
>