Fixes the following compilation error:
'atomic_uint8_t' in namespace 'std' does not name a type

Change-Id: Ie231b544cafc694271f50f4841b823e8cff3ec1d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2434390
Commit-Queue: Milad Farazmand <mfarazma@redhat.com>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Reviewed-by: Omer Katz <omerkatz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#70165}