Added the UIButton extension and tests to the tvOS targets.
Added the UIButton extension and tests to the tvOS targets.

Baza207/AlamofireImage,Pluto-tv/AlamofireImage,Alamofire/AlamofireImage,Pluto-tv/AlamofireImage,daniele-pizziconi/AlamofireImage,Baza207/AlamofireImage,Alamofire/AlamofireImage,sessuru/AlamofireImage,daniele-pizziconi/AlamofireImage,sessuru/AlamofireImage