Fix %import and %fragment forced inclusion to not generate code.

Examples/test-suite/import_fragments.i

@@ -0,0 +1,18 @@
+%module import_fragments
+
+// Check %fragments forced inclusion does not result in code generation when using %import
+%import "import_fragments_a.i"
+
+%{
+template<typename T>
+struct TemplateA4 {};
+%}
+
+%template(TemplateA4Int) TemplateA4<int>;
+
+%inline %{
+int getImport4() {
+  // Requires the ImportA4 fragment to be generated in order to compile
+  return ImportA4;
+}
+%}