fanotify: create FAN_ACCESS event for readdir

Before the patch, read creates FAN_ACCESS_PERM and FAN_ACCESS events,
readdir creates only FAN_ACCESS_PERM events.

This is inconsistent.

After the patch, readdir creates FAN_ACCESS_PERM and FAN_ACCESS events.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Eric Paris <eparis@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>