Add a note about checking refleaks to patchcheck.

Tools/scripts/patchcheck.py

@@ -170,8 +170,9 @@ def main():
 
     # Test suite run and passed.
     if python_files or c_files:
+        end = " and check for refleaks?" if c_files else "?"
         print()
-        print("Did you run the test suite?")
+        print("Did you run the test suite" + end)
 
 
 if __name__ == '__main__':