RFC: Pick up upstream jdk10 changes to sh/jdk10

[Roman Kennke]

Am 11.05.2018 um 14:57 schrieb Aleksey Shipilev:
> JDK 10.0.2 is 2 months away, so I suggest we pick up the current set of build, product, and test
> fixes to sh/jdk10 to give them a ride, and to match our code better:
>   http://cr.openjdk.java.net/~shade/shenandoah/merge-jdk10-2018-05-11/webrev.01/
> 
> Testing: hotspot_gc_shenandoah {fastdebug|release}
> 
> Thanks,
> -Aleksey
> 

Good, go for it!

Roman