ALLJOYN-1972 Provide a 'daemon' mode for ledctrl

ledctrl (BundledDaemon) app, packaged in Arduino Thin Client SDK,
runs to interact with AJ_LedService Arduino sketch.

For the sake of ease and clarity, a new sample app added so that it
just starts the BundledDaemon and waits for thin clients.
(after quietly advertising a well-known name that thin clients are looking for)

The intent is to package this sample, 'SampleDaemon', into
Arduino Thin Client SDK along with 'ledctrl'. Developers using Arduino
Thin Client SDK can use this SampleDaemon to connect their thin client apps.

Change-Id: Ib1f1825562174307074adaf964da4e00bba2df97