Merge "init: reset errno in do_start" into main am: 0508911496 am: 6011f614b4

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

Change-Id: I79717978c235ca8ab2ade68fb8743b88c18a839a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>