Merge "init: reset errno in do_start" into main am: 05089114 am: 6011f614 am: 3698ced0

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2720693



Change-Id: I0e9136b59eb2b7872b186727d9971065bdbb1c8d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>