status: make unresolved files always be in the morestatus structured output
We don't know the status of those files, only that they're unresolved, so
we don't output the status for those - any code parsing this will have to be
tolerant to that.
Differential Revision: https://phab.mercurial-scm.org/D7668
$ echo "[extensions]" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ hg init
$ echo 'base' > base
$ hg ci -Ambase
adding base
$ hg qnew -mmqbase mqbase
$ hg qsave
$ hg qrestore 2
restoring status: hg patches saved state