Doc: changes in the Debugger field in the Kits tab

Update screenshot.

Change-Id: I980ad1396854ea4e59b26ccbc780de86469276fb
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: hjk <qthjk@ovi.com>

doc/src/projects/creator-projects-targets.qdoc

@@ -91,11 +91,36 @@
             if they are installed on the development PC, but were not detected
             automatically. For more information, see \l{Adding Compilers}.
 
-        \o  In the \gui {Debugger command} field, specify the path to the
-            debugger command. On Windows, specify the path to the Windows
-            Console Debugger executable (32-bit version).
-            Select \gui {Auto detect} to automatically locate the debugger
-            command.
+        \o  In the \gui Debugger field, specify the type of debugger to
+            use (\gui {GDB Engine} or \gui {CDB Engine}) and the path to the
+            debugger command:
+
+            \list
+
+                \o  For the \gui {CDB Engine} (Windows only), specify the path to
+                    the Windows Console Debugger executable.
+
+                \o  For the \gui {GDB Engine}, specify the path to the GDB
+                    executable. The executable must be built with Python
+                    scripting support enabled (except when debugging on Mac OS).
+
+                    \list
+
+                        \o  For local debugging on Linux or Mac OS, select
+                            \gui {Auto Detect} to automatically locate the
+                            debugger command.
+
+                        \o  For debugging on embedded devices using a different
+                            ABI, you must provide a special executable.
+
+                        \o  For debugging on Windows using MinGW, select a
+                            Windows executable of GDB with Python scripting
+                            enabled. You can download it from
+                            \l{http://builds.qt-project.org/job/gdb-windows}.
+
+                    \endlist
+
+            \endlist
 
         \o  In the \gui {Qt version} field, select the Qt version to use for
             building the project. You can add Qt versions to the list if they