Added a Valgrind test that works for Python!

cmake/make_cmakelists.py

diff --git a/cmake/make_cmakelists.py b/cmake/make_cmakelists.py
index b3266fa..dea4397 100755
--- a/cmake/make_cmakelists.py
+++ b/cmake/make_cmakelists.py
@@ -220,7 +220,7 @@
   def rules_fuzzing_init(self):
     pass
 
-  def python_headers(self, **kwargs):
+  def system_python(self, **kwargs):
     pass