fixing platform.txt for samd arch (OpenOCD stable path)
fixing platform.txt for samd arch (OpenOCD stable path)

stevemarple/Arduino-org,stevemarple/Arduino-org,stevemarple/Arduino-org,stevemarple/Arduino-org,arduino-org/Arduino,arduino-org/Arduino,stevemarple/Arduino-org,stevemarple/Arduino-org,arduino-org/Arduino,arduino-org/Arduino,arduino-org/Arduino,stevemarple/Arduino-org,arduino-org/Arduino,arduino-org/Arduino,arduino-org/Arduino,stevemarple/Arduino-org