Add Caffe symlink to gitignore.
Add Caffe symlink to gitignore.

openmv/openmv,iabdalkader/openmv,openmv/openmv,openmv/openmv,kwagyeman/openmv,openmv/openmv,kwagyeman/openmv,kwagyeman/openmv,kwagyeman/openmv,iabdalkader/openmv,iabdalkader/openmv,iabdalkader/openmv