update swarm to 0.3.0-rc3

Signed-off-by: Andrea Luzzardi <[email protected]>

library/swarm

@@ -2,6 +2,6 @@
 # maintainer: Victor Vieux <[email protected]> (@vieux)
 # maintainer: Alexandre Beslic <[email protected]> (@abronan)
 
-0.3.0-rc2: git://github.com/docker/swarm-library-image@6f369b13c5241ff3db704e74c30bcace75cd2614
+0.3.0-rc3: git://github.com/docker/swarm-library-image@206d90c3d59ccc2e1b232d37edf3b492ca81693b
 0.2.0: git://github.com/docker/swarm-library-image@3c2dd0f73b7351744af64efb38e4fa5a015cc114
 latest: git://github.com/docker/swarm-library-image@3c2dd0f73b7351744af64efb38e4fa5a015cc114