The pointer to the first page of code space is not consistent and
therefore shouldn't be included in the mkgrokdump output.

No-Tree-Checks: true
Bug: v8:9844
Change-Id: I697c34e30e9b67b44e603e92d4bd3c7b81c1af3c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1856511
Commit-Queue: Seth Brenith <seth.brenith@microsoft.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64250}