It is broken because of the tricks we have to play with
lstat to get the bearable perfomance out of the call.
Sadly, it disables access to Cygwin's executable attribute,
which Windows filesystems do not have at all.
Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>