LiftoffAssembler::RecordSpillsInSafepoint

use Safepoint will be mistaken for v8::internal::Safepoint,
which cause build failure on riscv64, change it to use
SafepointTableBuilder::Safepoint

Bug: v8:12665
Change-Id: I597ea04b0c8b466c2f5a322d22ed989d00bedc5c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3492397Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79310}