add more cases

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8101 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/python/director_profile.i

@@ -1,5 +1,7 @@
 %module(directors="1") director_profile
 
+%include std_string.i
+
 %feature("director") B;
 
 
@@ -48,6 +50,14 @@
     {
       return b;
     }
+
+    virtual std::string vfs(const std::string& a) {
+      return a;
+    }
+    
+    std::string fs(const std::string& a) {
+      return vfs(a);
+    }
     
   };