add: Fix rollback when disk is completely full.

Noticed that it was possible for add to move a file to .git/annex/objects
and not make the link if the disk was full. This happened because the
location log update failed, and so addLink never got a chance to run.
Running addLink first fixes it; on error it will unwind by moving the file
back to where it was originally.

Command/Add.hs

@@ -250,12 +250,12 @@ addLink file key mcache = ifM (coreSymlinks <$> Annex.getGitConfig)
 
 cleanup :: FilePath -> Key -> Maybe InodeCache -> Bool -> CommandCleanup
 cleanup file key mcache hascontent = do
-	when hascontent $
-		logStatus key InfoPresent
 	ifM (isDirect <&&> pure hascontent)
 		( do
 			l <- inRepo $ gitAnnexLink file key
 			stageSymlink file =<< hashSymlink l
 		, addLink file key mcache
 		)
+	when hascontent $
+		logStatus key InfoPresent
 	return True