package/debianutils: improve help text

Add a note about the installed utilities.

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/debianutils/Config.in

@@ -4,4 +4,7 @@ config BR2_PACKAGE_DEBIANUTILS
 	help
 	  Miscellaneous utilities specific to Debian.
 
+	  The specific utilities included are: add-shell installkernel
+	  ischroot remove-shell run-parts savelog tempfile which.
+
 	  https://tracker.debian.org/pkg/debianutils