RFR: Upstream merge jdk/jdk -> shenandoah/jdk 2018-08-22

[Aleksey Shipilev]

On 08/22/2018 11:16 PM, Roman Kennke wrote:
> This is stage 1 of merging jdk-12+08 into shenandoah/jdk.
> 
> Notable changes:
> - 8154343: Make SATB related code available to other GCs
> - 8209668: Explicit barriers for C1/assembler
> 
> It does not include any actual tags. We'll tag this (including possible
> fixes and stuff that happens to go in) after nightlies look good.
> 
> http://cr.openjdk.java.net/~rkennke/jdk12-upstream-merge-2018-08-22/outgoing.txt

Looks good.

-Aleksey