net: skip TestReadLine if /etc/services does not exist
Fixes #65905
Change-Id: I42326d3b743e80d5226ea374eca5c9edaef4dd4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/566535
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com> Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>