Fix using statements for overloaded methods

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@10176 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/using_composition.i

@@ -26,4 +26,18 @@ public:
      char *blah(char *x) { return x; }
 };
 
+class FooBar2 : public Foo, public Bar {
+public:
+     char *blah(char *x) { return x; }
+     using Foo::blah;
+     using Bar::blah;
+};
+
+class FooBar3 : public Foo, public Bar {
+public:
+     using Foo::blah;
+     char *blah(char *x) { return x; }
+     using Bar::blah;
+};
+
 %}