[clang-tidy] Mention "add the check to release note" in add_new_check.py.

[Eugene.Zelenko]

I don't know how hard it'll be to implement, but will be great to add

• New <check name> <http://clang.llvm.org/extra/clang-tidy/checks/<check name>.html>_ check
  
  Please add short description here.

into "Improvements to clang-tidy" section. Ideally according to alphabetic order.

[alexfh]

In D31805#721433, @Eugene.Zelenko wrote:

I don't know how hard it'll be to implement, but will be great to add

• New <check name> <http://clang.llvm.org/extra/clang-tidy/checks/<check name>.html>_ check
  
  Please add short description here.

Good idea. Implemented in r307787. No alphabetic order though. Feel free to fix ;)

into "Improvements to clang-tidy" section. Ideally according to alphabetic order.

[hokein]

Good idea. Implemented in r307787. No alphabetic order though. Feel free to fix ;)

Looks good. Thanks!

Closing this revision.

clang-tidy/add_new_check.py

if not adapt_cmake(module_path, check_name_camel):
     return
   write_header(module_path, module, check_name, check_name_camel)
   write_implementation(module_path, module, check_name_camel)
   adapt_module(module_path, module, check_name, check_name_camel)
   write_test(module_path, module, check_name)
   write_docs(module_path, module, check_name)
   update_checks_list(clang_tidy_path)
   print('Done. Now it\'s your turn!')
+  print('Please remember to mention this check in docs/ReleaseNotes.rst '
+        '(in alphabetical order).')
 
 
 if __name__ == '__main__':
   main()