kernel32/tests: Allow failure when loading the 268 bytes minimal PE image.
Windows 10 1809+ rejects this minimal image so allow ERROR_BAD_EXE_FORMAT
as a valid result.
Also adjust the comment to reflect the range of Windows versions that
usually accept this image and note that there are some exceptions which
means there are other unidentified factors at play.
Wine-Bug: https://bugs.winehq.org//show_bug.cgi?id=51185
Signed-off-by: Francois Gouget <fgouget@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>