FR: config to ignore all elf files

Is your feature request related to a problem? Please describe. Some scripts ocasionally create elf files. It is probably a bad idea to commit elf files in most projects. Usually elf files are upper than size threashold, but in some cases I need to manally revert them since there is no file extension for them.

Describe the solution you'd like A config to ignore all elf files (and potentially other file types). Both globally and per repository.

Describe alternatives you've considered Extending git ignore syntax to cover file types somehow. It is much more design work and almost orthogonal to this feature request.

Additional context