QPID-6140: [C++ Messaging] hello_world does not define Messaging i/f completely
Add qpidtypes to hello_world and hello_xml example link library list so that 
users can execute any Messaging function straight away.



git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1630945 13f79535-47bb-0310-9956-ffa450edef68