Update TODO file with cluster membership 32/64/endian work being completed.

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@1060 fd59a12c-fef9-0310-b244-a6a79926bd2f

TODO

@@ -85,7 +85,7 @@ IMMS
 
 Cluster Membership
 ------------------
-* P1 32/64 bit cross-endian must be working.
+* P1 32/64 bit cross-endian testing.  Code completed and believed to be correct.
 
 Eventing
 --------