cmp: add Or
Fixes #60204
Change-Id: I1234cacf0f25097d034038bcfb33f6630373a057
GitHub-Last-Rev:
e9098ed8b3dd9125661e4340ffe01d846670ba0f
GitHub-Pull-Request: golang/go#60931
Reviewed-on: https://go-review.googlesource.com/c/go/+/504883
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: qiulaidongfeng <2645477756@qq.com>