config: update size information

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/coreutils/sum.c b/coreutils/sum.c
index 487e93f..16ec445 100644
--- a/coreutils/sum.c
+++ b/coreutils/sum.c
@@ -13,7 +13,7 @@
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 //config:config SUM
-//config:	bool "sum (4.3 kb)"
+//config:	bool "sum (4 kb)"
 //config:	default y
 //config:	help
 //config:	checksum and count the blocks in a file