Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/db2de74..0e1255a

Removing freenode from README (Dominic Hamon)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/0e1255a

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

Change-Id: Ibf16c3ba389fe8b35685660d3e78d3eccda1e6e5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2924507Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#74844}