cmd/go/testdata/script: loosen list_empty_importpath for freebsd
We've been seeing the flakes where we get a 'no errors' output on
freebsd in addition to windows and solaris. Also allow that case to
avoid flakes.
For #73976
Change-Id: I6a6a696445ec908b55520d8d75e7c1f867b9c092
Reviewed-on: https://go-review.googlesource.com/c/go/+/715640 Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Michael Matloob <matloob@google.com> Reviewed-by: Ian Alexander <jitsu@google.com>