Accept clang-format-4.0, since 3.8 is not available for Ubuntu 18.04.
Accept clang-format-4.0, since 3.8 is not available for Ubuntu 18.04.

I could build it myself but that seems unnecessary.

advancedtelematic/sota_client_cpp,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/aktualizr,advancedtelematic/sota_client_cpp