Added test suite support for -addObserverForName:object:queue:usingBlock: (needs to be added to GNUstep Base)

git-svn-id: svn://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/CoreObject@9854 7b3f36aa-e6db-49c1-8b4c-66eac1997e64