[Lorenz] diff_graphs.py prints added and removed edges

This is useful to see what dependencies were added and removed from one
version to another to track significant regressions or improvements.

Bug: 1166855
Change-Id: I7b5c8e76201b73074ac3b67078880d4bdb33cb3d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2686428
Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#859057}
GitOrigin-RevId: 7683590ba9464710094f8cd8b20bd4f96849b421
2 files changed