cmd/go/testdata/script: disable list_empty_importpath test on Windows
The test is flaking on windows, and I haven't been able to figure out
why. For now, to unblock folks, just allow the value that occasionally
appears: 'no errors' to avoid having a broken test. This seems like it's
probably a race though so we should fix it as soon as we can.
For #73976
Change-Id: I6a6a696431d784d048ed798b828a759e752b6393
Reviewed-on: https://go-review.googlesource.com/c/go/+/713220
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Michael Matloob <matloob@golang.org> Reviewed-by: Alan Donovan <adonovan@google.com> Reviewed-by: Michael Matloob <matloob@google.com>