Add recipes to the depgraph command.

recipes.py

Index: recipes.py
diff --git a/recipes.py b/recipes.py
index 4bf17d20d99a7a8a135483a369a6fc3af03fb12f..1fa89748c497f57ab3671f225458d67d55ff04b7 100755
--- a/recipes.py
+++ b/recipes.py
@@ -210,8 +210,8 @@ def depgraph(package_deps, args):
   _, config_file = get_package_config(args)
   universe = loader.RecipeUniverse(package_deps, config_file)
 
-  depgraph.main(universe, ignore_packages=args.ignore_package,
-                stdout=args.output)
+  depgraph.main(universe, package_deps.root_package,
+                ignore_packages=args.ignore_package, stdout=args.output)
 
 
 def doc(package_deps, args):