Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/680d3fd..fe2e8aa

Fix broken link to Setup/Teardown section (#1291) (Robert Adam)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/fe2e8aa

R=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com,mlippautz@chromium.org

Change-Id: I0a70d832e9ac24565e3876fa80b9d60c5ff92150
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3304140
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