properly disable stl.i in target languages which do not support it

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@8237 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/director_string.i

@@ -1,5 +1,8 @@
 %module(directors="1") director_string;
 %include stl.i
+
+#ifndef SWIG_STL_UNIMPL
+
 %include std_vector.i
 %include std_string.i
 
@@ -47,3 +50,6 @@ struct A
  %}
 
 %template(StringVector) std::vector<std::string>;
+
+
+#endif

Examples/test-suite/director_wstring.i

@@ -1,5 +1,8 @@
 %module(directors="1") director_wstring;
 %include stl.i
+
+#ifndef SWIG_STL_UNIMPL
+
 %include std_vector.i
 %include std_wstring.i
 
@@ -47,3 +50,5 @@ struct A
  %}
 
 %template(StringVector) std::vector<std::wstring>;
+
+#endif