This adds error functions that receive offsets instead of pc, since the
streaming compiler stores different sections in different buffers, so
computing pointer differences between different sections does not work.
We keep the pc-based methods for now to reduce code-churn and
complexity at the different call sites.

R=ahaas@chromium.org
CC=binji@chromium.org

Bug: v8:8238
Change-Id: I1aa68740bdda93c3341431aa7a81ac01ecfb71bb
Reviewed-on: https://chromium-review.googlesource.com/c/1354463Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57944}