Create different json files for diffferent optimization attempts of the same function.
This allows to analyze the graphs of early optimization attempts that lead to deopts or to produce a proper json file in the case of a deopt loop.

R=danno@chromium.org

Review-Url: https://codereview.chromium.org/2649513003
Cr-Commit-Position: refs/heads/master@{#42567}