Ship the prefork daemon configuration in automode packages even when the prefork commit is missing from the build checkout

Automode packages bundle both the prefork and postfork runtimes, and the prefork runtime looks for its configuration under a filename derived from the prefork commit hash. When that commit was not present in the build checkout, the configuration was silently left out and the prefork daemon started without it. The build can now be given the configuration hash directly, so the file is always shipped.
