fix java 9 or later substitution for JDK ProxyGenerator class

Author: javeleon

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/substitutions/Target_java_lang_reflect_ProxyGenerator.java

@@ -33,7 +33,7 @@
 @EspressoSubstitutions
 public final class Target_java_lang_reflect_ProxyGenerator {
 
-    @Substitution(versionFilter = VersionFilter.Java8OrEarlier.class)
+    @Substitution(versionFilter = VersionFilter.Java9OrLater.class)
     abstract static class GenerateProxyClass extends SubstitutionNode {
 
         abstract @JavaType(byte[].class) StaticObject execute(

espresso/src/com.oracle.truffle.espresso/src/com/oracle/truffle/espresso/substitutions/VersionFilter.java

@@ -53,6 +53,18 @@ public boolean isValidFor(JavaVersion version) {
         }
     }
 
+    final class Java9OrLater implements VersionFilter {
+        public static final Java9OrLater INSTANCE = new Java9OrLater();
+
+        private Java9OrLater() {
+        }
+
+        @Override
+        public boolean isValidFor(JavaVersion version) {
+            return version.java9OrLater();
+        }
+    }
+
     final class Java11OrEarlier implements VersionFilter {
         public static final Java11OrEarlier INSTANCE = new Java11OrEarlier();