bug#48354: [PATCH] Fix compat with latest mingw64-headers

[Konstantin Shabanov]

This commit to mingw-w64 broke compatibility with emacs-head because of the 
OS_NT conflict:

    In file included from w32image.c:32:
    w32common.h:45:3: error: expected identifier before numeric constant
       45 |   OS_NT
          |   ^~~~~

https://sourceforge.net/p/mingw-w64/mingw-w64/ci/dc7ef298837d4581200a3bed660aed36818c1b00/

The series of patches in attachments should fix the issue:
- the first one should cause the build to fail in the future instead of silent 
overriding definition;
- the second patch renames OS_9X to conform mingw-w64 naming;
- the third actually fixes build failure (preserving backward compatibility);

Best regards,
Konstantin Shabanov

0001-Reorder-headers-inclusion.patch
Description: Binary data

0003-Fix-compatibility-with-the-latest-mingw64-headers.patch
Description: Binary data

0002-Rename-OS_9X-to-OS_WIN95ORGREATER.patch
Description: Binary data