samples: add new mipsel-sde-elf sample.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
[yann.morin.1998@anciens.enib.fr: add pointer to ML thread]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

 reporter_name="Dragan Marinkovic <marinkovic.dragan@gmail.com>"

 reporter_url=""

 reporter_comment=""