[languages] in installed tree, try to find an executable "parrot-lang". If not exist, use "parrot lang.pbc".
[languages] in installed tree, try to find an executable "parrot-lang".
If not exist, use "parrot lang.pbc".

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@41788 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot