[scudo] Provide allocator declaration am: be9f4b02c6 am: 6293736553

Original change: https://android-review.googlesource.com/c/platform/external/scudo/+/2066954

Change-Id: I0d2dda30a144665c09297c184a5e784d74a7e003
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>