Make final class final

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/PyExpatModuleBuiltins.java

@@ -60,7 +60,7 @@
 import static com.oracle.graal.python.util.PythonUtils.toTruffleStringUncached;
 
 @CoreFunctions(defineModule = "pyexpat", os = PythonOS.PLATFORM_WIN32)
-public class PyExpatModuleBuiltins extends PythonBuiltins {
+public final class PyExpatModuleBuiltins extends PythonBuiltins {
     @Override
     protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
         return PyExpatModuleBuiltinsFactory.getFactories();