w32: Move defines for socket specific errors to qemu-os-win32.h

As those defines are only used for w32,
they should be in the header file for w32.

All files which include slirp.h or qemu_socket.h also
include qemu-os-win32.h.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
1 file changed