Keep using old version of zerocopy for now. am: 9c1ea3aa70

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/3393541

Change-Id: I3a54ce99ca47d982744c140d88ed048fa47f612e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>