Add sample config file for Linux Secondaries
Add sample config file for Linux Secondaries

Change-Id: I4cc703dece09937eb273ffdb84a16b3b08176cd1

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