build akregator only if krss was found
build akregator only if krss was found

svn path=/branches/work/akonadi-ports/kdepim/; revision=983690

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi