revset: fix ordering issue of "svnrev()" This is subtle. See https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-August/103368.html for the context. Basically, `subset & x` (instead of `x & subset`) should be used to make order correct given the current revset API.

include Makefile hgsubversion/help/*.rst tests/fixtures/invalid_utf8.tar.gz
recursive-include tests *.py *.sh *.svndump *.txt