hikey_debian: revert to Linaro RP 16.06 root FS

The Debian Stretch root FS we are pointing to no longer exists. Update
the package URL to download the latest released version instead. Use
released nvme.img, too.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Fixes: 5402dddb ("hikey_debian: Update rootfs to stretch")
Reviewed-by: Victor Chong <victor.chong@linaro.org>

docs/hikey.md

@@ -74,9 +74,6 @@ manifest file).
 Next, the `make flash` step will tell you how you should set the jumpers on the
 board and how to flash the device.
 
-**NOTE**: This will install a developer version of Debian, i.e. there will be NO
-GUI or desktop available, i.e. command line ONLY!
-
 **NOTE**: There have been reports of some boards stalling or getting stuck in
 `make flash` when flashing `SYSTEM_IMG`, i.e. the command does not complete
 after more than 5 minutes. If that happens, please try running `make recovery`

hikey_debian.mk

@@ -21,8 +21,8 @@ CFG_FLASH_SIZE ?= 8
 IP ?= 127.0.0.1
 
 # URL to images
-SYSTEM_IMG_URL=http://builds.96boards.org/snapshots/reference-platform/debian-iot/latest/hikey/hikey-rootfs-debian-stretch-iot-20170331-56.emmc.img.gz
-NVME_IMG_URL=http://builds.96boards.org/snapshots/reference-platform/components/uefi/latest/debug/hikey/nvme.img
+SYSTEM_IMG_URL=https://builds.96boards.org/releases/reference-platform/debian/hikey/16.06/hikey-rootfs-debian-jessie-alip-20160629-120.emmc.img.gz
+NVME_IMG_URL=https://builds.96boards.org/releases/hikey/linaro/binaries/latest/nvme.img
 
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 # Disallow use of UART0 for Debian Linux console