set annex.uuid in proxy's Repo

getRepoUUID looks at that, and was seeing the annex.uuid of the proxy.
Which caused it to unncessarily set the git config. Probably also would
have led to other problems.

Annex/UUID.hs

@@ -79,6 +79,7 @@ getRepoUUID r = do
 	
 	if c /= u && u /= NoUUID
 		then do
+			liftIO $ print (r, "setting cache", c, u)
 			updatecache u
 			return u
 		else return c