trying a bit harder to get a realpath for the py lib because

execnet-rsync does not support working with links

--HG--
branch : trunk

_py/test/config.py

@@ -261,8 +261,8 @@ class Config(object):
         conftestroots = config.getconftest_pathlist("rsyncdirs")
         if conftestroots:
             roots.extend(conftestroots)
-        pydirs = [py.path.local(py.__file__).dirpath(), 
-                  py._impldir]
+        pydirs = [x.realpath() for x in [py.path.local(py.__file__).dirpath(), 
+                  py._impldir]]
         roots = [py.path.local(root) for root in roots]
         for root in roots:
             if not root.check():