mq: fix regression in 6fd953d5faea It caused qrefresh; qrefresh -X addedfile to leave the file as normal in dirstate. It should be marked added on the second pass.

To run the tests, do:

cd tests/
python run-tests.py

See http://www.selenic.com/mercurial/wiki/index.cgi/WritingTests for
more information on writing tests.