use RawFilePath getFileStatus for speed

Only done on those calls to getFileStatus that had a RawFilePath, not a
FilePath. The others would probably be just as fast if converted to use
it with toRawFilePath, but I'm not 100% sure.

Note that genInodeCache' uses fromRawFilePath, but that value only gets
used on Windows, so on unix the thunk will never be evaluated.

Annex/Link.hs

@@ -182,7 +182,7 @@ restagePointerFile (Restage True) f orig = withTSDelta $ \tsd -> do
 	absf <- liftIO $ absPath $ fromRawFilePath f
 	Annex.Queue.addInternalAction runner [(absf, isunmodified tsd)]
   where
-	isunmodified tsd = genInodeCache (fromRawFilePath f) tsd >>= return . \case
+	isunmodified tsd = genInodeCache' f tsd >>= return . \case
 		Nothing -> False
 		Just new -> compareStrong orig new