jenkins: set hostname on startup

old-commit-hash: 8ee07def5c8b21c479b9f342ba490887237b2d0f

selfdrive/test/setup_device_ci.sh

@@ -29,6 +29,7 @@ sudo abctl --set_success
 
 # patch sshd config
 sudo mount -o rw,remount /
+echo tici-$(cat /proc/cmdline | sed -e 's/^.*androidboot.serialno=//' -e 's/ .*$//') | sudo tee /etc/hostname
 sudo sed -i "s,/data/params/d/GithubSshKeys,/usr/comma/setup_keys," /etc/ssh/sshd_config
 sudo systemctl daemon-reload
 sudo systemctl restart ssh