remote-hg: update bookmarks when pulling

Otherwise, the user would never ever see new bookmarks, only the
ones that (s)he initially cloned.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/remote-helpers/git-remote-hg

@@ -363,6 +363,9 @@ def get_repo(url, alias):
                 die('Repository error')
             repo.pull(peer, heads=None, force=True)
 
+        rb = peer.listkeys('bookmarks')
+        bookmarks.updatefromremote(myui, repo, rb, url)
+
     return repo
 
 def rev_to_mark(rev):