This helps debugging wasm crashes. {WasmCompiledFrame::Print} should
also print the position inside the current function, additional to the
absolute position in the wasm module. The source positions encoded in
wasm code are also function-relative, so with the additional output
it's easier to match them.

R=ahaas@chromium.org

Change-Id: I40f99e75e3ba25fdfd24943ea96e49868b91844f
Reviewed-on: https://chromium-review.googlesource.com/1138053Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54458}