[scudo] Provide allocator declaration am: be9f4b02c6

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

Change-Id: I5eaf79d8794311423f2f6a294352e79317ed5f0f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>