vc-ignore fixes.

vc-ignore fixes.

* vc/vc-svn.el (vc-svn-ignore): Remove `interactive'.  Use `*vc*'
buffer for output.

* vc/vc-hg.el (vc-hg-ignore): Remove `interactive'; do not assume
point-min==1; fix search string; fix parentheses missing.

* vc/vc-git.el (vc-git-ignore): Remove `interactive'; do not
assume point-min==1; fix search string; fix parentheses missing.

* vc/vc-cvs.el (vc-cvs-ignore): Remove `interactive'.

* vc/vc-bzr.el (vc-bzr-ignore): Remove `interactive'.  Use `*vc*'
buffer for output.