[8u] RFR 8253284: Zero OrderAccess barrier mappings are incorrect

[Aleksey Shipilev]

Original fix:
   https://bugs.openjdk.java.net/browse/JDK-8253284
   https://git.openjdk.java.net/jdk/commit/b9729cb4

Unfortunately, it does not apply to 8u, because JDK-7143664 changed a lot. Therefore, I re-did the 
patch for 8u, while trying to match the existing (correct) arch-specific mappings:
   https://cr.openjdk.java.net/~shade/8253284/webrev.8u.01/

Testing:
  - Linux x86_64 zero jcstress: continues to pass
  - Linux aarch64 (JDK-8253036) zero jcstress: starts to pass

-- 
Thanks,
-Aleksey