CMake: allow private libraries to be used on older OSes#83602

edymtt merged 3 commits intoswiftlang:mainswiftlang/swift:mainfrom

edymtt:edymtt/ensure-private-libraries-can-run-on-older-osesedymtt/swift:edymtt/ensure-private-libraries-can-run-on-older-osesCopy head branch name to clipboard