[11u]: 8221408: Windows 32bit build build errors/warnings in hotspot

[Lindenmaier, Goetz]

Hi

I would like to downport this change as it fixes warnings
of the windows 32 bit build with VS 2017.
I had to change the syntax of the pragma disabling
the warning in os_windows_x86.cpp, because the macros
used in jdk13 are not available in jdk11. Thus I need a review.
The rest applied cleanly.

http://cr.openjdk.java.net/~goetz/wr19/8221408-ntintel_warnings-jdk11/01/

1.       I assume I need to downport
2.       https://bugs.openjdk.java.net/browse/JDK-8221725<https://bugs.openjdk.java.net/browse/JDK-8221725>: AArch64 build failures after JDK-8221408 (Windows 32bit build build errors/warnings in hotspot), too.
3.       It's a simple cast and applies cleanly.

Best regards,
  Goetz.