perl: add testdepends for ssh
fixes:
DEBUG: [Running]$ ssh -l root -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o LogLevel=ERROR 192.168.7.4 export PATH=/usr/sbin:/sbin:/usr/bin:/bin; perl -e '$_="Uryyb, jbeyq"; tr/a-zA-Z/n-za-mN-ZA-M/;print'
| DEBUG: time:
1548816904.
4024463, endtime:
1548817204.397057
| DEBUG: Partial data from SSH call: ssh: connect to host 192.168.7.4 port 22: Connection refused
for master/thud/sumo
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
