Update google_benchmark

Rolling v8/third_party/google_benchmark/src: https://chromium.googlesource.com/external/github.com/google/benchmark/+log/c4b06e5..8fd49d6

Fix a -Wunreachable-code-aggressive warning (#1214) (Nico Weber)
https://chromium.googlesource.com/external/github.com/google/benchmark/+/8fd49d6

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

Change-Id: I1442e530778245ed2252fbed092147dd496e61da
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3108868Reviewed-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/main@{#76401}

DEPS

@@ -232,7 +232,7 @@ deps = {
     'condition': 'checkout_fuchsia',
   },
   'third_party/google_benchmark/src': {
-    'url': Var('chromium_url') + '/external/github.com/google/benchmark.git' + '@' + 'c4b06e5b7952ed43b638e8aab549876424896d02',
+    'url': Var('chromium_url') + '/external/github.com/google/benchmark.git' + '@' + '8fd49d66719b37156d8e4f7bc2817665ce43664a',
   },
   'third_party/googletest/src':
     Var('chromium_url') + '/external/github.com/google/googletest.git' + '@' + '0134d73a4902574269ff2e42827f7573d3df08ae',