mq: use `set_tracked` in `qrename`

This is the new shiny API.

Differential Revision: https://phab.mercurial-scm.org/D11018

hgext/mq.py

@@ -3641,7 +3641,7 b' def rename(ui, repo, patch, name=None, *'
         with r.wlock():
             if r.dirstate[patch] == b'a':
                 r.dirstate.drop(patch)
-                r.dirstate.add(name)
+                r.dirstate.set_tracked(name)
             else:
                 wctx.copy(patch, name)
                 wctx.forget([patch])