[issue4761] create Python wrappers for openat() and others

[Antoine Pitrou]

Changes by Antoine Pitrou <pitrou at free.fr>:


----------
stage: unit test needed -> patch review
versions: +Python 3.3 -Python 3.2

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4761>
_______________________________________