[IPV4]: Fix size description of CONFIG_INET.

CONFIG_INET now enlarges about 400KB, not 140KB.
Signed-off-by: NYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

net/Kconfig

@@ -45,7 +45,7 @@ config INET
 	---help---
 	  These are the protocols used on the Internet and on most local
 	  Ethernets. It is highly recommended to say Y here (this will enlarge
-	  your kernel by about 144 KB), since some programs (e.g. the X window
+	  your kernel by about 400 KB), since some programs (e.g. the X window
 	  system) use TCP/IP even if your machine is not connected to any
 	  other computer. You will get the so-called loopback device which
 	  allows you to ping yourself (great fun, that!).