RFR: 8236110: Windows (MSVC 2013) build failures after JDK-8233299

[Stefan Karlsson]

Hi all,

Please review this patch to add a configure check to see if the SDK 
supports the APIs needed to build ZGC on Windows.

https://cr.openjdk.java.net/~stefank/8236110
https://bugs.openjdk.java.net/browse/JDK-8236110

Verified that this configures and builds ZGC with the SDK used by Oracle:
https://wiki.openjdk.java.net/display/Build/Supported+Build+Platforms

and that it excludes ZGC for older SDKs by testing with VS2017 15.5.

This patch is intended for both JDK 14 and JDK 15.

Thanks,
StefanK