Add the repo from topdir to our yumobject for lorax.

This allows lorax to make use of the local low cost repo to fetch
packages from.  Buildinstall would previously get passed this repo as a
runtime argument.

src/pypungi/__init__.py

@@ -819,6 +819,11 @@ class Pungi(pypungi.PungiBase):
         self._inityum()
         yb = self.ayum
 
+        # Add the repo in the destdir to our yum object
+        self._add_yum_repo('ourtree',
+                           'file://%s' % self.topdir,
+                           cost=10)
+
         product = self.config.get('pungi', 'name')
         version = self.config.get('pungi', 'version')
         release = '%s %s' % (self.config.get('pungi', 'name'), self.config.get('pungi', 'version'))