J-Link: Initialize .transports to suppress warning.
jtag_interface.transports field was left uninitialized, which triggers warning message
on program startup.
Although hardware natively supports SWD interface, no software support
currently present, so the value choosen to be <jtag_only>.
Change-Id: I2da41790b1850950af416cec4362d5b7bf927b2b
Signed-off-by: Alexander Osipenko <sipych@gmail.com>
Reviewed-on: http://openocd.zylin.com/670
Tested-by: jenkins
Reviewed-by: Xiaofan <xiaofanc@gmail.com>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>