dataxfer: fix DBus XML definition

add annotation type to fix Qt usage for the custom-type
added by the DBus dataTransferInfo method.

Change-Id: I62b8d13171d25c73850c6120a1e5fec8fda07e72
Reviewed-by: Anthony Léonard <anthony.leonard@savoirfairelinux.com>

bin/dbus/cx.ring.Ring.ConfigurationManager.xml

@@ -1412,6 +1412,7 @@
 
 	   <method name="dataTransferInfo" tp:name-for-bindings="dataTransferInfo">
            <tp:added version="4.2.0"/>
+           <annotation name="org.qtproject.QtDBus.QtTypeName.Out0" value="DataTransferInfo"/>
            <arg type="(buttss)" name="DataTransferInfo" direction="out">
            </arg>
            <arg type="t" name="DataTransferId" direction="in">