Remove the restriction that we cannot reuse code objects generated for
OSR from Ignition to TurboFan.

R=jarin@chromium.org, mstarzinger@chromium.org, rmcilroy@chromium.org
BUG=v8:4764

Review-Url: https://codereview.chromium.org/2798293002
Cr-Commit-Position: refs/heads/master@{#44437}