changegroup: include subdirectory manifests in verbose size

When verbose logging is one, we report the size in bytes of the
manifest data in the changegroup. For files, we report the size per
file, but I'm not sure we need that level of detail (i.e. size per
directory manifest). Instead, report a single figure for the size of
root manifest plus submanifests.

mercurial/changegroup.py

@@ -824,10 +824,11 b' class cg1packer(object):'
         for x in self._packmanifests('', mfnodes, lookupmflinknode):
             size += len(x)
             yield x
-        self._verbosenote(_('%8.i (manifests)\n') % size)
         for dir, nodes in tmfnodes.iteritems():
             for x in self._packmanifests(dir, nodes, nodes.get):
+                size += len(x)
                 yield x
+        self._verbosenote(_('%8.i (manifests)\n') % size)
         yield self._manifestsdone()
 
     # The 'source' parameter is useful for extensions