This fixes the test SmallOrderedHashMapAllocate in
test-code-stub-assembler.cc, which uses memcmp to check
SmallOrderedHashMap objects for equality:
https://ci.chromium.org/p/v8/builders/ci/V8%20Linux%20-%20nosnap%20-%20debug/24470


Change-Id: I1c1ad2e8923322c856191fac30f109a4e671b98e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1667417
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62350}