contrib: fix URL for QT 4.8.5
contrib: fix URL for QT 4.8.5

It is now under "archive" instead of "official_releases"

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2