Update menuconfig items with approximate applet sizes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/arp.c b/networking/arp.c
index a62a376..f23ec86 100644
--- a/networking/arp.c
+++ b/networking/arp.c
@@ -13,7 +13,7 @@
  * modified for getopt32 by Arne Bernin <arne [at] alamut.de>
  */
 //config:config ARP
-//config:	bool "arp"
+//config:	bool "arp (11 kb)"
 //config:	default y
 //config:	select PLATFORM_LINUX
 //config:	help