ghost: Fix off-by-one when printing ghost path

The rfi->path doesn't contain the leading /, neither does the ghost->rpath,
so when attaching it to root don't forget to include one there.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Acked-by: Andrew Vagin <avagin@odin.com>

files-reg.c

@@ -105,7 +105,7 @@ static int create_ghost(struct ghost_file *gf, GhostFileEntry *gfe, struct cr_im
 		goto err;
 	}
 
-	snprintf(path + ret, sizeof(path) - ret, "%s", gf->remap.rpath);
+	snprintf(path + ret, sizeof(path) - ret, "/%s", gf->remap.rpath);
 	ret = -1;
 
 	if (S_ISFIFO(gfe->mode)) {