Merge pull request #1684 from haukepetersen/fix_yunjia_openocd

board/yunjia-nrf51822: adjusted openocd.cfg

boards/yunjia-nrf51822/dist/openocd.cfg

 # nRF51822 Target
 source [find interface/stlink-v2.cfg]
 
+transport select hla_swd
+
 set WORKAREASIZE 0x4000
-source [find target/nrf51_stlink.tcl]
+source [find target/nrf51.cfg]
 
 # use hardware reset, connect under reset
 #reset_config srst_only srst_nogate