Linux symbol CRCs: support 0 and report presence changes am: 2dcbaeb094

Original change: https://android-review.googlesource.com/c/platform/external/libabigail/+/2252144

Change-Id: I37dff07226a50c754a2bb42aac07c982a9a63f08
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>