sys/linux: Add binding to ioctl syscall + standard fd constants.

[marcs-feh]

Add binding to ioctl syscall, due to the vast nature of this syscall adding more device specific request values as constants is possible in the future, I opted to not add them.

Also added the stdin, stdout and stderr, to constants.odin for convenience sake when using this syscall

[flysand7]

You can push more commits to this PR just normally. Just make sure to push to the same branch from which you made this PR.

[Beefster09]

ayyyy

This will make a number of useful functions in a future core:terminal possible. isatty relies on ioctl calls and other things that detect terminal capabilities on *nix

[flysand7]

Make request parameter a u32. Everything else looks good to go.

[IllusionMan1212]

I would like to see this merged @marcs-feh if you've got some spare time.