Assembler::CheckBuffer() was defined inline in a header file but without
inline linkage, causing an undefined symbol link error on arm64 macOS.

Fixes: https://github.com/nodejs/node-v8/issues/233
Bug: v8:13055
Change-Id: Ifb638705e95de72b2e8d472e7092e88d77cf8ba8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3749583
Auto-Submit: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81749}