Update ffmpeg to version 20170620-ae6f6d4
Update ffmpeg to version 20170620-ae6f6d4

Cyianor/scoop,rasa/scoop,berwyn/scoop,nikolasd/scoop,kodybrown/scoop,lukesampson/scoop,yunspace/scoop,Congee/scoop,toxeus/scoop,coonce/scoop,vidarkongsli/scoop,reelsense/scoop