Add a new LogEntry for sharedlib PCs

Change-Id: I4f7fdca93a9905e41b73347df475dffcb84bcb89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2959620
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75125}