Add goocanvas-2.0 to gramps dependencies

Also remove gramps-40 target, it doesn't belong in trunk now that it has 
its own branch.



git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21173 4ae1f11a-8b86-4847-b8af-ab372f36d1fd