Update ffmpeg to version 20171031-88c7aa1
Update ffmpeg to version 20171031-88c7aa1

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