use python3_sitearch for including the python code

Closes: #502
Signed-off-by: Evgeni Golov <evgeni@debian.org>

lxc.spec.in

@@ -269,9 +269,6 @@ fi
 %{_sbindir}/*
 %{_libdir}/*.so.*
 %{_libdir}/%{name}
-%if %{with_python}
-%{_libdir}/python*
-%endif
 %{_localstatedir}/*
 %{_libexecdir}/%{name}
 %attr(4111,root,root) %{_libexecdir}/%{name}/lxc-user-nic
@@ -281,8 +278,7 @@ fi
 %endif
 
 %if %{with_python}
-%{_libdir}/python3.3/site-packages/_lxc*
-%{_libdir}/python3.3/site-packages/lxc/*
+%{python3_sitearch}/*
 %endif
 
 %if %{with_lua}