config: update size information

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util-linux/umount.c b/util-linux/umount.c
index e2329f8..077b635 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -8,7 +8,7 @@
  * Licensed under GPLv2, see file LICENSE in this source tree.
  */
 //config:config UMOUNT
-//config:	bool "umount (4.5 kb)"
+//config:	bool "umount (5.1 kb)"
 //config:	default y
 //config:	select PLATFORM_LINUX
 //config:	help