Make sure to pass the clone3 arguments all the way to the fork handler
so it can check the flags. Currently nothing I know of uses fork plus
the new clone3 flags, but it would be hard to see without any logging.
clone3 was added in Linux 5.3 but our minimum spec is 5.0. Additionally
the Raspberry Pi 5 kernel seems to complain about clone3 for some
reason?
Just use clone instead of clone3
A bit of refactoring necessary before we can move the remaining Linux
specific code to the frontend.
Most of this taken from #3535 but attempting to be NFC as much as
possible.
Which requires moving LinuxEmulation to its own independent folder as
well. Since both IRLoader and FEXLoader rely on it.
No functional change, just moves the the code around.
Lioncache