Пакет mk-syscall-rules: Информация

- Fix: Use "usergroup-change" key in audit rules (to match the nagwad
  filter key).

- mk-syscall-rules: Add --relax option to relax on undetected arch.
- Run mk-syscall-rules in relaxed mode when installing the package
  in Hasher.
- Extract mk-syscall-rules into the separate package.

- nagwad-audit: Explicitly require 'which' that isn't detected
  automatically as a requirement.