Builtin functions were being logged via both LogCodeObjects and
LogCompiledFunctions. The latter assumes the code in question has a
Name and so would end up logging an unattributable entry. This patch
stops logging that entry.

Bug: v8:8061
Change-Id: Iebc9bfa9618986afdbf8b1b71b64bf17a1f4196a
Reviewed-on: https://chromium-review.googlesource.com/1184923Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Bret Sepulveda <bsep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55379}