menu: visually split Shells from Utilities

As discussed in [1], add comments to distinghuish shells from utilities in
the 'Shells and Utilities' menu.

[1] http://lists.busybox.net/pipermail/buildroot/2013-December/083836.html

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -948,12 +948,14 @@ source "package/xenomai/Config.in"
 endmenu
 
 menu "Shell and utilities"
-source "package/at/Config.in"
+comment "Shells"
 if BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
 source "package/bash/Config.in"
 source "package/dash/Config.in"
 source "package/zsh/Config.in"
 endif
+comment "Utilities"
+source "package/at/Config.in"
 source "package/dialog/Config.in"
 source "package/dtach/Config.in"
 source "package/file/Config.in"