no gr7 deb packaging yet, but at least link to the most modern prior control files

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@35401 15284696-431f-4ddb-bdfa-cd5b030d7da7

debian/README.debian

@@ -1,6 +1,6 @@
 # For preparing GRASS Debian package run
 
-svn co svn://svn.debian.org/pkg-grass/packages/grass/branches/6.3/debian debiangis
+svn co svn://svn.debian.org/pkg-grass/packages/grass/branches/6.4/debian debiangis
 mv debiangis/* .
 
 # in this directory. It will download latest debian configuration files