v22.7.0 no longer compiles under freebsd

[ncw]

v22.6.0 used to compile just fine with freebsd but v22.7.0 does not giving this error

daemon/sdnotify_unix.go:31:17: undefined: unix.ClockGettime

I used git bisect to track it down to this commit 6d96518 by @corhere

Fail

$ git co main
$ GOOS=freebsd go build ./daemon
# github.com/coreos/go-systemd/v22/daemon
daemon/sdnotify_unix.go:31:17: undefined: unix.ClockGettime
$ 

OK

$ git co v22.6.0
$ GOOS=freebsd go build ./daemon
$ 

[corhere]

unix.ClockGettime wrappers for Solaris and the BSDs were added to golang.org/x/sys/unix in v0.3.0. @ncw you can work around this until the golang.org/x/sys/unix requirement is bumped in go-systemd by running go get golang.org/x/sys/unix@v0.3.0 (or @latest) in your project.