more compact progress display

Each progress can be on a single line instead of two.

[sp: Changed "Checking files out" to "Checking out files" at
     Johannes Sixt's suggestion as it better explains the
	 action that is taking place]

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

builtin-unpack-objects.c

@@ -322,7 +322,7 @@ static void unpack_all(void)
 	use(sizeof(struct pack_header));
 
 	if (!quiet)
-		start_progress(&progress, "Unpacking %u objects...", "", nr_objects);
+		start_progress(&progress, "Unpacking objects", nr_objects);
 	obj_list = xmalloc(nr_objects * sizeof(*obj_list));
 	for (i = 0; i < nr_objects; i++) {
 		unpack_one(i);