[pyclutter] Include Python.h before standard headers
[pyclutter] Include Python.h before standard headers

From the Python C-API documentation: Since Python may define some
pre-processor definitions which affect the standard headers on some
systems, you must include Python.h before any standard headers are
included.

This should avoid warnings about a redefined _POSIX_C_SOURCE definition.

pmarti/pyclutter,GNOME/pyclutter,GNOME/pyclutter,pmarti/pyclutter,pmarti/pyclutter,pmarti/pyclutter