suzerain: track perfect_decl.py

I want perfect_decl.py revision-controlled so that
both results can be checked back against revisions
(in case of mistakes) and because that way folks
can simply download the postprocessing Python
logic without needing to build Suzerain.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@45514 0bd85f0b-c151-43b9-a1e9-27231104551f