On Intel chips, MAP_JIT is required when the hardened runtime is
enabled, which it is in Chrome. Without MAP_JIT, it is then not possible
to allocate executable pages in an address space reservation.

Bug: chromium:1276887
Change-Id: I632fdfc9e6cf02bac95e630e6404fea7d8f4c176
Cq-Include-Trybots: luci.v8.try:v8_linux64_heap_sandbox_dbg_ng,v8_linux_arm64_sim_heap_sandbox_dbg_ng
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3310913
Commit-Queue: Samuel Groß <saelo@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78255}