try set _FILE_OFFSET_BITS=64 for all projects on Windows 1

mingw-w64 13 changed the way stat() is mapped in sys/stat.h.
This triggered a `stat()` call made from an unused libpsl API
to require the `stat64i32` intrinsic, while previously it
mapped to `__imp__stat64`.

Reported-by: Mac-Fly
Bug: https://curl.se/mail/lib-2025-10/0007.html

Author: vszakats

_build.sh

@@ -892,6 +892,8 @@ build_single_target() {
 
     _CPPFLAGS_GLOBAL+=' -D_FORTIFY_SOURCE=3'  # Requires mingw-w64 11.0.0
 
+    _CPPFLAGS_GLOBAL+=' -D_FILE_OFFSET_BITS=64'
+
   elif [ "${_OS}" = 'mac' ]; then
     if [ "${_HOST}" != "${_OS}" ]; then
       _CMAKE_GLOBAL="-DCMAKE_SYSTEM_NAME=Darwin ${_CMAKE_GLOBAL}"