appveyor: bump to Qt 5.9.0 LTS built by me
appveyor: bump to Qt 5.9.0 LTS built by me

kripton/qlcplus,sbenejam/qlcplus,mcallegari/qlcplus,mcallegari/qlcplus,kripton/qlcplus,mcallegari/qlcplus,sbenejam/qlcplus,plugz/qlcplus,sbenejam/qlcplus,sbenejam/qlcplus,mcallegari/qlcplus,plugz/qlcplus,mcallegari/qlcplus,mcallegari/qlcplus,plugz/qlcplus,sbenejam/qlcplus,plugz/qlcplus,kripton/qlcplus,sbenejam/qlcplus,plugz/qlcplus,plugz/qlcplus,plugz/qlcplus,sbenejam/qlcplus,kripton/qlcplus,kripton/qlcplus,kripton/qlcplus,kripton/qlcplus,mcallegari/qlcplus