ntfs: handle MFT records that contain $ATTRIBUTE_LIST attribute

ntfs: handle MFT records that contain $ATTRIBUTE_LIST attribute

MFT records that contain $ATTRIBUTE_LIST attributes, for example, are
those that there are many hards links, or the file itself is very
fragmented, and so on.

So when attributes of a MFT record that don't fit in a MFT record, those
will be stored in one or more MFT records and can be found through the
attribute list's entries of the MFT record being acessed, which are in
the $ATTRIBUTE_LIST attribute.

ntfs_attr_list_lookup() function will be called once we didn't find the
attribute within the MFT record itself so that the attribute will presumably
be stored in another MFT record, according to the information that has
been retrieved from the attribute list's entry.

Signed-off-by: Paulo Alcantara <pcacjr@gmail.com>