Prepare swig for running pyauto on win.

Work around a weird python nag on win. Python.h uses a _DEBUG macro to conditionally load debug version of the python lib. This conflicts with MSVS which defines _DEBUG in Debug configuration.
This change works around this problem by including Python.h without the _DEBUG macro, since we don't want to debug python itself in any case. 

Accompanying CL in Cr src:
Review URL:

git-svn-id: 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed