[libvoikko/f16] Remove the isa macro from the malaga-suomi-voikko dependency, malaga-suomi-voikko is not a library a

[Ville-Pekka Vainio]

Summary of changes:

  b05f987... Remove the isa macro from the malaga-suomi-voikko dependenc (*)

(*) This commit already existed in another branch; no separate mail sent