compel: use a correct name format for vma files in /proc/pid/map_files/

Currently we use the "map_files/%p-%p" format, but actually it should
be "map_files/%lx-%lx".

The kernel could handle both formats, but recently Alexey Dobriyan fixed
the kernel and it accept only the second format.
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

compel/src/lib/infect.c

@@ -695,8 +695,8 @@ static int parasite_mmap_exchange(struct parasite_ctl *ctl, unsigned long size)
 
 	ctl->map_length = round_up(size, page_size());
 
-	fd = ctl->ictx.open_proc(ctl->rpid, O_RDWR, "map_files/%p-%p",
-		 ctl->remote_map, ctl->remote_map + ctl->map_length);
+	fd = ctl->ictx.open_proc(ctl->rpid, O_RDWR, "map_files/%lx-%lx",
+		 (long)ctl->remote_map, (long)ctl->remote_map + ctl->map_length);
 	if (fd < 0)
 		return -1;