New test cases.

From-SVN: r25422

gcc/testsuite/g++.old-deja/g++.ns/alias7.C

@@ -0,0 +1,11 @@
+//Build don't link:
+namespace A{
+  namespace B{int i;}
+  using namespace B;
+}
+
+namespace C=A;
+
+void f(){
+  C::i = 1;
+}

gcc/testsuite/g++.old-deja/g++.ns/ns17.C

@@ -0,0 +1,13 @@
+//Build don't link:
+namespace foo
+{
+  class c
+  {
+  };
+};
+
+int
+foo::c:fn ()  // ERROR - syntax error
+{
+}
+