Silence sdkmanager on Windows

sdkmanager is already silenced on the other OSes, as it prints thousands
of lines of progress bars in the logfiles.

Change-Id: I4a2aa422a83cfe5fc6a3a7ba7be69e1e9c01acc0
Reviewed-by: Heikki Halmet <heikki.halmet@qt.io>

coin/provisioning/common/windows/android.ps1

@@ -97,7 +97,7 @@ Out-File -FilePath C:\Utils\Android\licenses\android-sdk-license -Encoding utf8
 
 cd $toolsFolder\bin\
 $sdkmanager_args += "platforms;$sdkApiLevel", "platform-tools", "build-tools;$sdkBuildToolsVersion"
-$command = 'for($i=0;$i -lt 6;$i++) { $response += "y`n"}; $response | .\sdkmanager.bat @sdkmanager_args'
+$command = 'for($i=0;$i -lt 6;$i++) { $response += "y`n"}; $response | .\sdkmanager.bat @sdkmanager_args | Out-Null'
 Invoke-Expression $command
 $command = 'for($i=0;$i -lt 6;$i++) { $response += "y`n"}; $response | .\sdkmanager.bat --licenses'
 iex $command