hikey960: add super.img to update image am: fbd395ff6e am: 452c1ef3ed am: e98070a7e7 am: cbec490f76

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia9e72c0792f9b4a43aa56113c4acafc08d631301