sync: fix TestCondSignalStealing flake
Fixes: #59043
Change-Id: I8215948a772566641dab1079a9837128450deb1b
GitHub-Last-Rev:
0fa6f08a70658e1272da0c82812de752350d394d
GitHub-Pull-Request: golang/go#59160
Reviewed-on: https://go-review.googlesource.com/c/go/+/477955
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>