{WasmCompileLazyFrameConstants::kFixedFrameSizeFromFp} did not
incorporate padding. This CL fixes that.

R=mstarzinger@chromium.org

No-Try: true
Bug: chromium:853468
Change-Id: I042e68623bdfd81c96180a39c29ecd70271ba1be
Reviewed-on: https://chromium-review.googlesource.com/1105051
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53817}