scudo: Adjust test to use correct check for primary allocations. am: 882b85aeec am: dea1e7950a

Original change: https://android-review.googlesource.com/c/platform/external/scudo/+/1533521

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5052b8d4f398a15eb74120bbb54e61df07e679ee