Revert "Remove obsolete jackaudio version 1."

This reverts commit bdb77826d9.

Jack1 is not obsolete and neither jack1 nor jack2 is called 'jackaudio'.

Q: What's the difference between Jack1 and Jack2?
A: http://trac.jackaudio.org/wiki/Q_differenc_jack1_jack2

pkgs/applications/audio/lash/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, alsaLib, gtk, jackaudio, libuuid, libxml2
+{ stdenv, fetchurl, alsaLib, gtk, jack2, libuuid, libxml2
 , makeWrapper, pkgconfig, readline }:
 
 assert libuuid != null;
@@ -15,7 +15,7 @@ stdenv.mkDerivation  rec {
   # http://permalink.gmane.org/gmane.linux.redhat.fedora.extras.cvs/822346
   patches = [ ./socket.patch ./gcc-47.patch ];
 
-  buildInputs = [ alsaLib gtk jackaudio libuuid libxml2 makeWrapper
+  buildInputs = [ alsaLib gtk jack2 libuuid libxml2 makeWrapper
     pkgconfig readline ];
 
   postInstall = ''