You were unable to defeat all of the Wargs, but Goldínwen has another plan.
'Besides slaying the Wargs, perhaps there is another way to make their Warg-breeding ineffective. Every camp has a leader, and these Wargs have many handlers.
'If you would, go to Maudhul-ulur and defeat any goblin-keepers you find. Perhaps by defeating the handlers, the Wargs will be thrown into disarray.
'When you have slain the goblin-keepers, return to me.'
Goblin Warg-keepers can be found at Maudhul-ulur, south from Echad Glamodúd.
Goldínwen has asked you to defeat the goblin Warg-keepers in order to throw the kennel into disarray.
Goldínwen is at Echad Glamodúd, north from Maudhul-ulur.
You should return to Goldínwen and report your success.