Set __package__ the same way in celeryd as elsewhere

This fixes a NameError on __package__ that got me on Python 2.5

celery/bin/celeryd.py

@@ -73,7 +73,7 @@
 """
 from __future__ import absolute_import
 
-if "__main__" and __package__ is None:
+if __name__ == "__main__" and __package__ is None:
     __package__ = "celery.bin.celeryd"
 
 import sys