Add MQTT library

[marcosboggia]

Hi! I would like to know if it is possible and how to add a prebuilt mqtt library i downloaded (paho mqtt for C made by Eclipse) using Parrot SDK for bebop. I've been reading the html included in that SDK and I could not figure out how to add those libraries. Those are some *.so files and their *.h headers to include, for example, in BebopSample. Thanks !