expose native encoding constant

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@804430 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/Expand.java

@@ -70,7 +70,7 @@ public class Expand extends Task {
     private boolean stripAbsolutePathSpec = false;
     private boolean scanForUnicodeExtraFields = true;
 
-    private static final String NATIVE_ENCODING = "native-encoding";
+    public static final String NATIVE_ENCODING = "native-encoding";
 
     private String encoding = "UTF8";
     /** Error message when more that one mapper is defined */