argument to point to .clang-format-ignore file

[PhKP]

When using the script in a build server environment, it is a limitation that I need to place a .clang-format-ignore in the same directory as the python script.

I would be happy if I could get an input argument for the script that points to the .clang-format-ignore file. This way it would be possible to keep the script in a docker image and point to a .clang-format-ignore file in the version controlled repository.