[aarch64-port-dev ] RFR/Feedback(XS) 8248668: AArch64: Avoid MIN/MAX macros when using MSVC

[Monica Beckwith]

On Windows, we employ min/max as macros ��, hence we have made a few changes to appropriate shared sources:

JBS: https://bugs.openjdk.java.net/browse/JDK-8248668 
Webrev: http://cr.openjdk.java.net/~mbeckwit/8248668/webrev.00/ 

Regards,
Monica