win32: Rename the uninstall exe.
win32: Rename the uninstall exe.

Resolves #467.

javiercantero/streamlink,wlerin/streamlink,chhe/livestreamer,bastimeyer/streamlink,Dobatymo/livestreamer,javiercantero/streamlink,jtsymon/livestreamer,lyhiving/livestreamer,melmorabity/streamlink,gravyboat/streamlink,streamlink/streamlink,programming086/livestreamer,Klaudit/livestreamer,blxd/livestreamer,streamlink/streamlink,chhe/streamlink,okaywit/livestreamer,sbstp/streamlink,Klaudit/livestreamer,bastimeyer/streamlink,Masaz-/livestreamer,gtmanfred/livestreamer,fishscene/streamlink,charmander/livestreamer,derrod/livestreamer,gravyboat/streamlink,beardypig/streamlink,Saturn/livestreamer,charmander/livestreamer,Feverqwe/livestreamer,hmit/livestreamer,Feverqwe/livestreamer,intact/livestreamer,Dobatymo/livestreamer,caorong/livestreamer,chrippa/livestreamer,flijloku/livestreamer,chhe/streamlink,ethanhlc/streamlink,wlerin/streamlink,flijloku/livestreamer,programming086/livestreamer,ethanhlc/streamlink,caorong/livestreamer,back-to/streamlink,wolftankk/livestreamer,chhe/livestreamer,blxd/livestreamer,fishscene/streamlink,Masaz-/livestreamer,wolftankk/livestreamer,Saturn/livestreamer,intact/livestreamer,jtsymon/livestreamer,mmetak/streamlink,chrippa/livestreamer,derrod/livestreamer,gtmanfred/livestreamer,melmorabity/streamlink,beardypig/streamlink,mmetak/streamlink,back-to/streamlink,hmit/livestreamer,sbstp/streamlink,okaywit/livestreamer,lyhiving/livestreamer