added --unionfs option

git-svn-id: http://trac.vinelinux.org/repos/projects/vbootstrap/trunk@486 ec354946-7b23-47d6-9f5a-488ba84defc7

vbuilder-bash-completion.sh

@@ -22,7 +22,7 @@ _vbuilder()
     first="${COMP_WORDS[1]}"
 
     ## The basic options we'll complete.
-    options="--version --arch --dist-upgrade --target --with-compat32"
+    options="--version --arch --dist-upgrade --unionfs --target --with-compat32"
     actions="--clean --build --build-rpm --install-rpm --remove-rpm"
     opts="$options $actions"