Update appveyor to block for rdp after build

Author: Kapil Borle

appveyor.yml

@@ -64,3 +64,5 @@ on_finish:
             # You can add other artifacts here
             (ls $zipFile)
         ) | % { Push-AppveyorArtifact $_.FullName }
+        $blockRdp = $true
+        iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))