Fix namespace used by qbluetooth.cpp

Change-Id: I84d598b638ba6a4511863d3659e6540916e2dffe
Reviewed-by: Fabian Bumberger <fbumberger@rim.com>
Reviewed-by: Aaron McCarthy <mccarthy.aaron@gmail.com>

src/bluetooth/qbluetooth.cpp

@@ -41,7 +41,7 @@
 
 #include <QtBluetooth/qbluetooth.h>
 
-QT_BEGIN_NAMESPACE
+QT_BEGIN_NAMESPACE_BLUETOOTH
 
 namespace QBluetooth {
 
@@ -76,4 +76,4 @@ namespace QBluetooth {
 */
 }
 
-QT_END_NAMESPACE
+QT_END_NAMESPACE_BLUETOOTH