Merge "Document how to use tzalloc()/tzfree() with std::unique_ptr." am: 8995672880 am: 5aeec3b87d am: d301fe1a1f am: 7ea8a9ea53

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2636324

Change-Id: Idfe21dc4ce0e4e233e56352d7503b7de1a6ffa74
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>