Apparently the fuzzer tries to create functions with more 130000
parameters, which is too much for TurboFan. For returns I use the
wasm limit because only wasm uses multiple returns.

R=clemensh@chromium.org

Bug: chromium:811070
Change-Id: Ib9a55439c1da8e82ef5f35ffb2e79cab8d4a9018
Reviewed-on: https://chromium-review.googlesource.com/913268Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51231}