ostree: Fix clang-tidy warnings
ostree: Fix clang-tidy warnings

Signed-off-by: Andy Doan <e3579b1e47f273529f0f929453e939a68ede9fd1@opensourcefoundries.com>

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