hikey960: add super.img to update image am: fbd395ff6e am: 452c1ef3ed

Original change: https://android-review.googlesource.com/c/device/linaro/hikey/+/1561518

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic09807bc9ce5767e8a9946d6d0ed588e5b8bf0b9