Doc: Updated the \example command to point to the right directory

qdoc needs a directory with a project file to generate the source
files list at the bottom of the example page.

Change-Id: I06b459cce495435d68ed5555ff4f48c860b63e64
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>

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

@@ -26,7 +26,7 @@
 ****************************************************************************/
 
 /*!
-    \example xmlpatterns/xquery/globalVariables
+    \example xmlpatterns/xquery
     \title C++ Source Code Analyzer Example
     \ingroup xmlpattern_examples