stack.py: Don't assume --chrome-symbols-dir values are relative to DIR_SORUCE_ROOT This tripped me up. It's much less surprising to interpret relative paths as being relative to CWD. I could find no checked-in usages of this flag, so hopefully does not break anything. Change-Id: I6b6db76f2583027e5bc3eba15f49dd32b1b37bf3 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3370067 Auto-Submit: Andrew Grieve <[email protected]> Reviewed-by: Siddhartha S <[email protected]> Commit-Queue: Siddhartha S <[email protected]> Cr-Commit-Position: refs/heads/main@{#956653} NOKEYCHECK=True GitOrigin-RevId: c7ff2988bf93f1ec508ec103d2d53a96e194ef34