Revert "cmd/go: relax the regular expression of TestScript/list_pkgconfig_error"
This reverts commit
906338f82fc6641e834964def3199ac25df93e94.
Reason for revert: break gotip-linux-loong64 builder.
Fixes #69651
Updates #68283
Change-Id: I909b52ed0fd999e21c00c1d9d80d7fe2fd4898a1
Reviewed-on: https://go-review.googlesource.com/c/go/+/616336
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Michael Matloob <matloob@golang.org>