Since we can't OSR from an function compiled with Ignition, this makes it
impossible to tier up asm.js code as it is running. As such, this CL
bypasses Ignition for asm.js code.

BUG=v8:4280
LOG=N

Review-Url: https://codereview.chromium.org/1994223002
Cr-Commit-Position: refs/heads/master@{#36483}