Add flags from config file (.yml) before default flags (#378)
Add flags from config file (.yml) before default flags (#378)

Fix https://github.com/bazelbuild/continuous-integration/issues/376
bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration