This CL moves even more limits to wasm-limits.h and enforces limits for
types, functions, parameter counts, return counts, local counts, imports,
globals, and exports.

R=clemensh@chromium.org, ahaas@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2574133002
Cr-Commit-Position: refs/heads/master@{#41699}