scudo: Store header on deallocation before retagging memory. am: e8e24c7c07 am: 4a27ba0f04 am: d70642b4fa

Original change: https://android-review.googlesource.com/c/platform/external/scudo/+/1685703

Change-Id: Ia0568fbf9765b811d24e8a942f32c7377b9d06ee