[Bug 39904] Suppress "You must use msvcrt when building in Unicode/MBCS mode" error when __MSVCRT__ is defined (-mno-cygwin)

https://bugs.winehq.org/show_bug.cgi?id=39904

Anthony Fok  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Show "You must use msvcrt   |Suppress "You must use
                   |when building in            |msvcrt when building in
                   |Unicode/MBCS mode" error    |Unicode/MBCS mode" error
                   |only if                     |when __MSVCRT__ is defined
                   |!defined(__MSVCRT__)        |(-mno-cygwin)