the additional newline character was earlier (wrongly) dropped by the serial line module, but is now handled by the ringbuf-based serial line implementation
Tests Contiki ELF loader and shell command 'exec': Hello-world is compiled as a Contiki executable (.ce) and is uploaded to the single Sky node via serial port (base64 encoded). The node then loads and starts the uploaded hello-world application. Test succeeds when the 'Hello, World' output appears
