RFR(S): 8229422: Taskqueue: Outdated selection of weak memory model platforms

[Doerr, Martin]

Hi all,

@David:
Thanks for the more verbose description for aarch64. I've pushed it with this version.

@Thomas:
Thanks for creating JDK-8230392. I've created JDK-8230434 for making C1 and C2 consistent.

> Somebody take my keyboard from me!
@The person who has potentially taken Derek's keyboard:
Please give it back to him. We miss him. 😊
But I had already an ok from him for webrev.00.

Best regards,
Martin