(swig) Added Wccl::FunctionalOpSequence, Wccl::UntypedOpSequence, Wccl::OpSequence, Wccl::WcclFileOpSections to wccl library

It would create one only if top-level parse_match_operator
parser rule had been used. Now it creates it within
match_rule_operator parser rule, so it works for parse_wccl_file
as well.