This is a port of e5630ea9:
"[builtins,x64] pc-relative builtin-to-builtin calls".

Bug: v8:6666
Change-Id: Id53bf45c6a4fedb1c972ced72984b6673808ee96
Reviewed-on: https://chromium-review.googlesource.com/1126249Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
Cr-Commit-Position: refs/heads/master@{#54243}