Add a warning not to edit the apc parsers header files

gen-apc-parsers.py

@@ -227,6 +227,7 @@ static inline void
 
 def write_header(text, path):
     with open(path, 'w') as f:
+        print(f'// This file is generated by {__file__} do not edit!', file=f, end='\n\n')
         print('#pragma once', file=f)
         print(text, file=f)
     subprocess.check_call(['clang-format', '-i', path])