The module builder was outputting the address as an unsigned LEB value
instead of a signed value, leading to wrong results.

R=manoskouk@chromium.org

Bug: v8:11863
Change-Id: I547ca98defcae0ba15b4004a506b65387534b08a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3463715Reviewed-by: Manos Koukoutos <manoskouk@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79090}