Separate csv creation

src/freedombone-image-vmdebootstrap

 
 if [ ! -d /usr/share/distro-info ]; then
     sudo mkdir -p /usr/share/distro-info
+fi
+
+if [ ! -f /usr/share/distro-info/debian.csv ]; then
+    sudo mkdir -p /usr/share/distro-info
 
     cat <<EOF > /tmp/debian.csv
 version,codename,series,created,release,eol
 ,Experimental,experimental,1993-08-16
 EOF
     sudo mv /tmp/debian.csv /usr/share/distro-info/
+fi
 
+if [ ! -f /usr/share/distro-info/ubuntu.csv ]; then
     cat <<EOF > /tmp/ubuntu.csv
 version,codename,series,created,release,eol,eol-server
 4.10,Warty Warthog,warty,2004-03-05,2004-10-20,2006-04-30