Add Deep Learning for Self-Driving Cars course (#2889)

* Add Deep Learning for Self-Driving Cars course

* trailing slash

free-courses-en.md

@@ -136,6 +136,7 @@
 
 * [Convolutional Neural Networks for Visual Recognition](http://cs231n.github.io)
 * [Deep Learning for Natural Language Processing](http://cs224d.stanford.edu)
+* [MIT 6.S094: Deep Learning for Self-Driving Cars](https://selfdrivingcars.mit.edu)
 * [Practical Deep Learning For Coders taught](http://www.fast.ai) - Jeremy Howard
 * [Self-Paced Courses for Deep Learning ](https://developer.nvidia.com/deep-learning-courses)
 * [Unsupervised Feature Learning and Deep Learning](http://deeplearning.stanford.edu/tutorial)