Merge "hikey960: add link for mainline kernel build instructions" am: 983cd2a208

Original change: https://android-review.googlesource.com/c/device/linaro/hikey/+/2487455

Change-Id: Ie976cb3d3fec575ee0ee6695207e5da01d8b8d68
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>