alpine-amd64-node10-tf-a: fix sshd startup

We need a custom setup-sshd script for Alpine, in order to generate SSH
host keys. The script should be run as root and we use the buildslave
user to login through SSH.

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Change-Id: I09d2d7a4fdf3673ac37071c83d3a968ded3dbc8c
3 files changed