Tests/Install/windows/test-install.ps1: run install.cmd with -Verbose

Tests/Install/windows/test-install.ps1

@@ -18,7 +18,7 @@ Move-Item -Path InstallCache -Destination $installCache
 Get-ChildItem .\BinaryDrop\cntk\Scripts\install\windows\ps\ -Recurse -File -Include *.ps1, *.psm1 |
   Add-Content -Stream Zone.Identifier -Value "[ZoneTransfer]`r`nZoneId=3`r`n"
 
-.\BinaryDrop\cntk\Scripts\install\windows\install.bat -NoConfirm @PSBoundParameters
+.\BinaryDrop\cntk\Scripts\install\windows\install.bat -NoConfirm -Verbose @PSBoundParameters
 if ($LASTEXITCODE -ne 0) {
   throw "Fail"
 }