[scudo] Adjust page map buffer size am: 146abcd216

Original change: https://android-review.googlesource.com/c/platform/external/scudo/+/2478535

Change-Id: I8f8db1b2d5aea82270436f289c6193aaeef94e48
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>