test: relax live.go for GOEXPERIMENT=unified
test: relax live.go for GOEXPERIMENT=unified

This CL applies the same change to test/live.go that was previously
applied to test/live_regabi.go in golang.org/cl/415240. This wasn't
noticed at the time though, because GOEXPERIMENT=unified was only
being tested on linux-amd64, which is a regabi platform.

Change-Id: I0c75c2b7097544305e4174c2f5ec6ec283c81a8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/422254
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Cuong Manh Le <54b4457f1dff6823379654eb5867596497ba782f@gmail.com>
Reviewed-by: David Chase <ae171625adc8645b8b79b7e405a6da5aba5341e0@google.com>
Run-TryBot: Matthew Dempsky <e56ac2c500064424afac424d4b5e53bd0570a731@google.com>

golang/go,golang/go,golang/go,golang/go,golang/go,golang/go,golang/go,golang/go