Fix for issue #564: nrf5-app.mk does not consider JLINK_SN on targets flash_softdevice and erase
Fix for issue #564: nrf5-app.mk does not consider JLINK_SN on targets flash_softdevice and erase

openweave/openweave-core,openweave/openweave-core,openweave/openweave-core,openweave/openweave-core,openweave/openweave-core,openweave/openweave-core