Merge "Add source of unwind when fatal error." into main am: 122a57630e

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3349258

Change-Id: I58cb531dd256e18fd73500f6edf66b0f03af7966
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>