Update native-image.properties

Author: timfel

mx.graalpython/native-image.properties

@@ -11,4 +11,6 @@ LauncherClassPath = lib/graalvm/launcher-common.jar:lib/graalvm/graalpython-laun
 JavaArgs = -Xmx4G -Dpolyglot.engine.PreinitializeContexts=python
 
 Args = -H:MaxRuntimeCompileMethods=7000 \
+       -H:+AddAllCharsets \
+       --initialize-at-build-time=com.oracle.graal.python,org.antlr.v4 \
        -H:SubstitutionResources=com/oracle/graal/python/aot/substitutions.json