Change format of mktables output binary property tables

Change format of mktables output binary property tables

mktables now outputs the tables for binary properties as inversion
lists, with a size as the first element.  This means simpler handling of
these tables in the core, including removal of an entire pass over them
(it was done just to get the size).  These tables are marked as for
internal use by the Perl core only, so their format is changeable at
will.