As the wasm compilation pipeline skips the start and end phase of
normal pipelines, we do not log compilation start/end for functions,
which makes reading log output more complicated than need be.

Change-Id: I1566ab7428b2dd9763c443000e946d4c6c789626
Reviewed-on: https://chromium-review.googlesource.com/c/1304540Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57093}