Tag version 1.7.1 in setup.py

This was forgotten before the tagging ..

Author: iMichka

setup.py

@@ -7,7 +7,7 @@
 from setuptools import setup
 
 setup(name="pygccxml",
-      version="v1.7.0",
+      version="v1.7.1",
       author="Roman Yakovenko",
       author_email="roman yakovenko at gmail com",
       maintainer="Michka Popoff and the Insight Software Consortium",