FreeBSD Port: lang/rust: fails to apply no-hardlinks patch.

From: Tatsuki Makino <tatsuki_makino_at_hotmail.com>
Date: Wed, 10 Jan 2024 00:20:07 UTC
Hello.

rust-1.75.0 fails to apply the patch.
This is because src/bootstrap/lib.rs is moving to src/bootstrap/src/lib.rs.
However, since the condition is `sysctl -n kern.osreldate` < 1300521, this seems to be removable.

I am sending a CC to rust@, but I am not a subscriber so this will not be sent.

Regards.