Larry, the attached patch converts what is convertible of
Modules/_ctypes/_ctypes.  Although, I ran into an odd case
with this conversion: the converted functions are each used
in *multiple* PyMethodDef tables.  So while clinic can generate
equivalent code, the builtins are not all pinned to one type.
The type I pinned it to is the same type that the methods
are documented against:
http://docs.python.org/2/library/ctypes.html#ctypes._CData

Since clinic makes you explicitly specify the fully qualified method
name, I assume sharing like this is not allowed.

Thoughts?