Update remaining menuconfig items with approximate applet sizes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

util-linux/blkdiscard.c

@@ -6,7 +6,7 @@
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 //config:config BLKDISCARD
-//config:	bool "blkdiscard"
+//config:	bool "blkdiscard (5.3 kb)"
 //config:	default y
 //config:	help
 //config:	  blkdiscard discards sectors on a given device.

util-linux/fallocate.c

@@ -6,7 +6,7 @@
  */
 
 //config:config FALLOCATE
-//config:	bool "fallocate"
+//config:	bool "fallocate (5 kb)"
 //config:	default y
 //config:	help
 //config:	  Preallocate space for files.

util-linux/nsenter.c

@@ -8,7 +8,7 @@
  */
 
 //config:config NSENTER
-//config:	bool "nsenter"
+//config:	bool "nsenter (8.6 kb)"
 //config:	default y
 //config:	select PLATFORM_LINUX
 //config:	help

util-linux/unshare.c

@@ -7,7 +7,7 @@
  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
 //config:config UNSHARE
-//config:	bool "unshare"
+//config:	bool "unshare (9.2 kb)"
 //config:	default y
 //config:	depends on !NOMMU
 //config:	select PLATFORM_LINUX