start Windows Search service on appveyor build machine

Author: jjw24

appveyor.yml

@@ -5,6 +5,7 @@ init:
       $version = new-object System.Version $env:APPVEYOR_BUILD_VERSION
       $env:flowVersion = "{0}.{1}.{2}" -f $version.Major, $version.Minor, $version.Build
 - sc config WSearch start= auto # Starts Windows Search service- Needed for running ExplorerTest
+- net start WSearch
 
 assembly_info:
   patch: true