Doc: requirements for QML debugging on devices

Task-number: QTCREATORBUG-4420
Change-Id: I0ee9bd7f3a8ce48c11fc18049ebf3b9d6e833b8c
Reviewed-on: http://codereview.qt.nokia.com/1773


Reviewed-by: Kai Koehne <kai.koehne@nokia.com>

doc/qtcreator.qdoc

@@ -9128,6 +9128,10 @@
     \note You need Qt 4.7.1 or later to debug Qt Quick projects. Debugging projects
     not created with the Qt Quick wizards is only supported with Qt 4.8, or later.
 
+    To debug Qt Quick applications running on devices, you must install
+    Qt 4.7.4, or later, libraries on devices. To debug applications on Symbian
+    devices, you must install also QML Viewer on them.
+
     \section1 Setting Up QML Debugging
 
     The process of setting up debugging for Qt Quick projects depends on the type of
@@ -9171,6 +9175,10 @@
 
     \endlist
 
+    To debug Qt Quick Applications on devices, install Qt 4.7.4, or later,
+    libraries on devices. Then select the device as the target before you
+    start debugging.
+
     \section1 Starting QML Debugging
 
     To start the application, choose \gui {Debug > Start Debugging