Make 'dexdump2 -l xml' include whether each class is an interface.

Change-Id: Id83ef52454596ab80b16042e58ff9d00bc5fb8ed
diff --git a/test/dexdump/staticfields.xml b/test/dexdump/staticfields.xml
index 6cff71b..c906f0a 100644
--- a/test/dexdump/staticfields.xml
+++ b/test/dexdump/staticfields.xml
@@ -3,6 +3,7 @@
 >
 <class name="StaticFields"
  extends="java.lang.Object"
+ interface="false"
  abstract="false"
  static="false"
  final="false"