hikey960: add super.img to update image am: fbd395ff6e am: 452c1ef3ed am: e98070a7e7

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: If12dda18ce8f89c327fa0c48b038730c2551eaf3