Update for changes to lackey



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@6586 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/NEWS b/NEWS
index a2a0d83..22e9b3d 100644
--- a/NEWS
+++ b/NEWS
@@ -16,6 +16,11 @@
   they just return 3 (as before).  Also, SET_VBITS doesn't report
   definedness errors if any of the V bits are undefined.
 
+- The behaviour of the tool Lackey has changed slightly.  First, the output
+  from --trace-mem has been made more compact, to reduce the size of the
+  traces.  Second, a new option --trace-superblocks has been added, which
+  shows the addresses of superblocks (code blocks) as they are executed.
+
 Developer-visible changes:
 
 - The names of some functions and types within the Vex IR have changed.