RFR: Upstream merge to jdk-12+21

[Aleksey Shipilev]

On 11/22/18 6:52 PM, Aleksey Shipilev wrote:
> On 11/22/18 6:50 PM, Roman Kennke wrote:
>> Is there a fix to cherry-pick already? I can also wait a little...
> 
> Roland and others are working on it here:
>   http://mail.openjdk.java.net/pipermail/hotspot-dev/2018-November/035402.html
> 
> Realistically, I would give it a day to properly hit the repo and testing.

Also, it would be after jdk-12+21 tag, right? So we gain nothing by waiting. It is easier for us to
cherry-pick after the merge, and wait next week for another merge to gain the actual fix.

-Aleksey