COMPMID-417 - Fix documentation

Added explanation about how to build the example graph_lenet.cpp

Change-Id: I1da0683f6284a77e0f3e11250a96bc9f0d7f0b97
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/89690
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
1 file changed