For me not work.
My update.
$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
linux-firmware-image-sun7i linux-headers-sun7i linux-image-sun7i linux-jessie-root-cubietruck
4 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 20.4 MB of archives.
After this operation, 12.3 kB of additional disk space will be used.
Do you want to continue? [Y/n]
Get:1 http://apt.armbian.com/ jessie/main linux-firmware-image-sun7i armhf 5.15 [285 kB]
Get:2 http://apt.armbian.com/ jessie/main linux-headers-sun7i armhf 5.15 [5,786 kB]
Get:3 http://apt.armbian.com/ jessie/main linux-image-sun7i armhf 5.15 [14.0 MB]
Get:4 http://apt.armbian.com/ jessie/main linux-jessie-root-cubietruck armhf 5.15 [372 kB]
Fetched 20.4 MB in 5s (3,561 kB/s)
(Reading database ... 52931 files and directories currently installed.)
Preparing to unpack .../linux-firmware-image-sun7i_5.15_armhf.deb ...
Unpacking linux-firmware-image-sun7i (5.15) over (5.11) ...
Preparing to unpack .../linux-headers-sun7i_5.15_armhf.deb ...
Unpacking linux-headers-sun7i (5.15) over (5.11) ...
Preparing to unpack .../linux-image-sun7i_5.15_armhf.deb ...
Unpacking linux-image-sun7i (5.15) over (5.11) ...
Preparing to unpack .../linux-jessie-root-cubietruck_5.15_armhf.deb ...
Unpacking linux-jessie-root-cubietruck (5.15) over (5.11) ...
Processing triggers for systemd (215-17+deb8u4) ...
Setting up linux-firmware-image-sun7i (5.15) ...
Setting up linux-headers-sun7i (5.15) ...
Compiling headers - please wait ...
Setting up linux-image-sun7i (5.15) ...
Setting up linux-jessie-root-cubietruck (5.15) ...
The update not make the magic line:
mkimage -A arm -O linux -T kernel -C none -a "0x40008000" -e "0x40008000" -n "Linux kernel" -d zImage uImage