archive: change "matcnfn" argument to a real matcher
All callers seem to be passing a real matcher, not just a function. We
were also passing it into match.subdirmatcher(), which assumes it is a
matcher.
Differential Revision: https://phab.mercurial-scm.org/D5176
#require docutils gettext
$ $TESTDIR/check-gendoc fr
checking for parse errors