Merge "fstab.hikey960: make it possible for vendor partition to be remounted" am: dc8ba44cb3 am: 9519851722 am: 43848cedf5

Original change: https://android-review.googlesource.com/c/device/linaro/hikey/+/1326954

Change-Id: I29de51e4d0975bef316134bed8d874f6dc68621f