This will be generated automatically by the Makefile. It's not appropriate
to generate in the configure script, and I do not recall why I did
so---possibly to work around the issue of delayed tab completion when it
needs regeneration?
This removes suppmk-gen in favor of more generic Makefile targets---in this
case, having `%.tdat` depend upon `rater/core/tdat.xml`, even though that's
not quite true (the %.xml file generated from it needs it). But these files
are going away soon; a pending TAME optimization branch removes support for
the underlying pattern primitive entirely; CSVMs should be used instead.