Fuzzers use a slight variant of the sse4_1 flag, see
https://source.chromium.org/chromium/chromium/src/+/master:v8/tools/testrunner/testproc/fuzzer.py;l=26;drc=9491d5eaa4e764721b5269e75af68f181bef09cf.

Bug: v8:10863
Change-Id: Ifc467644f00a4f10776794c12a227f13774f48ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2387555Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69652}