reproducible Debian: install rustc on jenkins for the...

reproducible Debian: install rustc on jenkins for the reproducible-html-build-path-prefix-map-spec job

Signed-off-by: Holger Levsen <holger@layer-acht.org>

update_jdn.sh

@@ -461,7 +461,8 @@ if [ -f /etc/debian_version ] ; then
 				qemu-system-x86 
 				qemu-user-static 
 				radvd 
-				ruby-rspec 
+				ruby-rspec
+				rustc
 				seabios 
 				shorewall 
 				shorewall6