joystick12: Add comments to C++ example
joystick12: Add comments to C++ example

Signed-off-by: Sarah Knepper <aa6f32c7068de0436ab460eb7d52c137f945f426@intel.com>

jontrulson/upm,skiselev/upm,afmckinney/upm,Jon-ICS/upm,jontrulson/upm,stefan-andritoiu/upm,srware/upm,sasmita/upm,nitirohilla/upm,0xD34D/upm,rafaneri/upm,g-vidal/upm,Propanu/upm,Propanu/upm,noahchense/upm,stefan-andritoiu/upm,MakerCollider/upm,jontrulson/upm,GSmurf/upm,sasmita/upm,andreivasiliu2211/upm,intel-iot-devkit/upm,fieldhawker/upm,afmckinney/upm,nitirohilla/upm,skiselev/upm,Propanu/upm,tylergibson/upm,yoyojacky/upm,pylbert/upm,arfoll/upm,Vaghesh/upm,tylergibson/upm,tripzero/upm,malikabhi05/upm,arfoll/upm,srware/upm,g-vidal/upm,tripzero/upm,srware/upm,nitirohilla/upm,malikabhi05/upm,mircea/upm,kissbac/upm,malikabhi05/upm,kissbac/upm,tylergibson/upm,tylergibson/upm,fieldhawker/upm,tylergibson/upm,g-vidal/upm,andreivasiliu2211/upm,afmckinney/upm,malikabhi05/upm,ShawnHymel/upm,pylbert/upm,kissbac/upm,MakerCollider/upm,0xD34D/upm,g-vidal/upm,rafaneri/upm,mircea/upm,yoyojacky/upm,Jon-ICS/upm,nitirohilla/upm,whbruce/upm,noahchense/upm,spitfire88/upm,sasmita/upm,mircea/upm,ShawnHymel/upm,skiselev/upm,spitfire88/upm,nitirohilla/upm,kissbac/upm,Vaghesh/upm,jontrulson/upm,andreivasiliu2211/upm,ShawnHymel/upm,arfoll/upm,0xD34D/upm,pylbert/upm,andreivasiliu2211/upm,tripzero/upm,skiselev/upm,intel-iot-devkit/upm,MakerCollider/upm,arfoll/upm,afmckinney/upm,skiselev/upm,rafaneri/upm,ShawnHymel/upm,mircea/upm,yoyojacky/upm,malikabhi05/upm,Propanu/upm,GSmurf/upm,Vaghesh/upm,spitfire88/upm,skiselev/upm,MakerCollider/upm,arfoll/upm,pylbert/upm,sasmita/upm,noahchense/upm,tripzero/upm,mircea/upm,kissbac/upm,spitfire88/upm,intel-iot-devkit/upm,whbruce/upm,afmckinney/upm,GSmurf/upm,fieldhawker/upm,MakerCollider/upm,whbruce/upm,srware/upm,Jon-ICS/upm,Jon-ICS/upm,srware/upm,izard/upm,yoyojacky/upm,Propanu/upm,izard/upm,yoyojacky/upm,g-vidal/upm,GSmurf/upm,intel-iot-devkit/upm,Jon-ICS/upm,rafaneri/upm,tripzero/upm,fieldhawker/upm,pylbert/upm,g-vidal/upm,izard/upm,stefan-andritoiu/upm,malikabhi05/upm,stefan-andritoiu/upm,whbruce/upm,spitfire88/upm,whbruce/upm,0xD34D/upm,sasmita/upm,stefan-andritoiu/upm,andreivasiliu2211/upm,jontrulson/upm,pylbert/upm,intel-iot-devkit/upm,ShawnHymel/upm,noahchense/upm,rafaneri/upm,Propanu/upm,Vaghesh/upm,intel-iot-devkit/upm,stefan-andritoiu/upm