dgit: commit_quilty_patch: Handle other file statuses too

dgit: commit_quilty_patch: Handle other file statuses too

In particular, R can occur if all Debian changes have been removed in
a package with single-debian-patch, in which case we would fail to
commit the patch queue removal.  I don't think dpkg-source will remove
files in other cases, so this is probably the only actually buggy
case.

I don't think the other letters are particularly likely but if they
occur they should be committed too.  I have deliberately excluded U
which should definitely not occur.

Closes:#893263.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>