Doc: Grouped the XML pattern examples under xmlpattern_examples group

Change-Id: Id026f8fe89d5a6e59de5bca14b5d0b5eb2a41752
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

examples/xmlpatterns/filetree/doc/src/filetree.qdoc

@@ -28,6 +28,7 @@
 /*!
   \example xmlpatterns/filetree
   \title File System Example
+  \ingroup xmlpattern_examples
 
   This example shows how to use Qt XML Patterns for querying non-XML
   data that is modeled to look like XML. 

examples/xmlpatterns/recipes/doc/src/recipes.qdoc

@@ -28,6 +28,7 @@
 /*!
   \example xmlpatterns/recipes
   \title Recipes Example
+  \ingroup xmlpattern_examples
 
   The Recipes example shows how to use Qt XML Patterns to query XML data
   loaded from a file. 

examples/xmlpatterns/schema/doc/src/schema.qdoc

@@ -28,6 +28,7 @@
 /*!
   \example xmlpatterns/schema
   \title XML Schema Validation Example
+  \ingroup xmlpattern_examples
 
   The XML Schema Validation example shows how to use Qt XML Patterns to
   validate XML with a W3C XML Schema.

examples/xmlpatterns/trafficinfo/doc/src/trafficinfo.qdoc

@@ -28,7 +28,7 @@
 /*!
     \example xmlpatterns/trafficinfo
     \title TrafficInfo Example
-
+    \ingroup xmlpattern_examples
     Shows how XQuery can be used extract information from WML documents provided by a WAP service.
 
     \section1 Overview

examples/xmlpatterns/xquery/doc/src/globalVariables.qdoc

@@ -28,6 +28,7 @@
 /*!
     \example xmlpatterns/xquery/globalVariables
     \title C++ Source Code Analyzer Example
+    \ingroup xmlpattern_examples
 
     This example uses XQuery and the \c xmlpatterns command line utility to
     query C++ source code.