assert that produced bundles can be run in a vanilla osx

last bundle: http://rhizolab.org/leap/leap-client-59c6d94.dmg it still needs mcnair's seal of approval :D

tested in lion, snow leopard. note that it took ages in a vm (snow leopard).

(from redmine: created on 2013-04-01, closed on 2013-04-09, blocks #2079 (closed))