Code such as

    var a;
    (a) = function() {};

should not lead to a.name being set to "a".

This fixes the last of the anonymous function naming bugs.

Bug: v8:4709
Change-Id: I70c2fcbcec1a57752fd58038262d02aefe26e28a
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2970705Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75321}