makefiles/openocd-adapters/iotlab: default to JTAG transport
makefiles/openocd-adapters/iotlab: default to JTAG transport

RIOT-OS/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,miri64/RIOT,kYc0o/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,jasonatran/RIOT,kaspar030/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,ant9000/RIOT,RIOT-OS/RIOT,miri64/RIOT,kaspar030/RIOT,authmillenon/RIOT,kaspar030/RIOT,jasonatran/RIOT,jasonatran/RIOT,ant9000/RIOT,authmillenon/RIOT,kYc0o/RIOT,jasonatran/RIOT,kaspar030/RIOT,kYc0o/RIOT,ant9000/RIOT,authmillenon/RIOT,miri64/RIOT,authmillenon/RIOT,OTAkeys/RIOT,ant9000/RIOT,miri64/RIOT,OTAkeys/RIOT,jasonatran/RIOT,kaspar030/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,authmillenon/RIOT,miri64/RIOT,authmillenon/RIOT,OTAkeys/RIOT,kYc0o/RIOT,ant9000/RIOT,kYc0o/RIOT