Up the version number.

Change-Id: Ibf1e0471d1991c0b9ef7df847b427a3aead6fd4d
diff --git a/dx/src/com/android/dx/Version.java b/dx/src/com/android/dx/Version.java
index b22173d..c69b322 100644
--- a/dx/src/com/android/dx/Version.java
+++ b/dx/src/com/android/dx/Version.java
@@ -21,5 +21,5 @@
  */
 public class Version {
     /** {@code non-null;} version string */
-    public static final String VERSION = "1.5";
+    public static final String VERSION = "1.6";
 }