Update menuconfig items with approximate applet sizes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/archival/rpm2cpio.c b/archival/rpm2cpio.c
index 7057570..9d503be 100644
--- a/archival/rpm2cpio.c
+++ b/archival/rpm2cpio.c
@@ -8,7 +8,7 @@
  */
 
 //config:config RPM2CPIO
-//config:	bool "rpm2cpio"
+//config:	bool "rpm2cpio (20 kb)"
 //config:	default y
 //config:	help
 //config:	  Converts a RPM file into a CPIO archive.