QEMU installer with WHPX support

This bug has been copied automatically from: https://bugs.launchpad.net/qemu/+bug/1879672
Reported by 'Philippe Mathieu-Daudé' on 2020-05-20 :

People often ask the community to add WHPX support to the QEMU installer
for Windows,
but it is impossible due to the license limitations of the WHPX SDK.

The WinHvEmulation.h and WinHvPlatform.h header files needed are "All
rights reserved".

However these headers only contain struct definitions and integer
constants,
no functional code in macros or inline functions. See:
https://www.mail-archive.com/qemu-devel@nongnu.org/msg645815.html
It is questionable whether the headers alone can be considered
copyrightable material.

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