this is referred from https://github.com/bazelbuild/platforms/blob/master/cpu/BUILD#L78

Change-Id: I2e33f45ee05c5e8d63104de98de15fb21ddc23e6
Reviewed-on: https://code-review.googlesource.com/c/re2/+/57470


Reviewed-by: Paul Wankadia <junyer@google.com>