After moving the shared function info creation to be during unoptmized
compile finalization the --print-bytecode flag caused a crash by trying
to access the shared function info before it was created. This CL fixes it.

BUG=v8:5203

Change-Id: I82c0431bace51aa44154c55ad4bebde897f7a39e
Reviewed-on: https://chromium-review.googlesource.com/579769Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46810}