Considered renamable name-spaces which are not translation units.

Signed-off-by: Dimitar Dobrev <dpldobrev@yahoo.com>

src/Generator/Passes/RenamePass.cs

@@ -40,6 +40,7 @@ namespace CppSharp.Passes
             if (decl is Property) return true;
             if (decl is Event) return true;
             if (decl is TypedefDecl) return true;
+            if (decl is Namespace && !(decl is TranslationUnit)) return true;
             return false;
         }