typedef5.C: check whether typedefs can be redefined to the same non-trivial type

typedef5.C: check whether typedefs can be redefined to the same non-trivial type

	* g++.old-deja/g++.other/typedef5.C: check whether typedefs can be
 	redefined to the same non-trivial type
	* g++.old-deja/g++.pt/explicit73.C: test for proper
 	namespace-qualification of template specializations declared in
 	other namespaces
	* g++.old-deja/g++.other/friend4.C: check whether it is possible
	to declare a subset of the specializations of a template function
	as friends of specializations of a template class
	* g++.old-deja/g++.pt/explicit71.C: make sure specializations of
 	member templates that do not fully specialize the enclosing
 	template class are rejected

From-SVN: r22392