jack: change package and attr names to 'jack1' and 'jack2'

Currently, we have a 'jack' package with attrname 'jack1d' and a
'jackdbus' package with attrname 'jackaudio'. Make it consistent 'jack1'
and 'jack2' in both package name and attrname.

This aligns the naming with what can be found on the JACK homepage.

Q: what's the difference between jack1 and jack2?
A: http://trac.jackaudio.org/wiki/Q_differenc_jack1_jack2

pkgs/development/libraries/aubio/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, alsaLib, fftw, jackaudio, libsamplerate
+{ stdenv, fetchurl, alsaLib, fftw, jack2, libsamplerate
 , libsndfile, pkgconfig, python
 }:
 
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   };
 
   buildInputs = [
-    alsaLib fftw jackaudio libsamplerate libsndfile pkgconfig python
+    alsaLib fftw jack2 libsamplerate libsndfile pkgconfig python
   ];
 
   configurePhase = "python waf configure --prefix=$out";

pkgs/development/libraries/dssi/default.nix

@@ -1,5 +1,5 @@
 x@{builderDefsPackage
-  , ladspaH, jackaudio, liblo, alsaLib, qt4, libX11, libsndfile, libSM
+  , ladspaH, jack2, liblo, alsaLib, qt4, libX11, libsndfile, libSM
   , libsamplerate, libtool, autoconf, automake, xproto, libICE, pkgconfig
   , ...}:
 builderDefsPackage

pkgs/development/libraries/haskell/jack/default.nix

@@ -1,6 +1,6 @@
 # This file was auto-generated by cabal2nix. Please do NOT edit manually!
 
-{ cabal, enumset, eventList, explicitException, jackaudio, midi
+{ cabal, enumset, eventList, explicitException, jack2, midi
 , nonNegative, transformers
 }:
 
@@ -13,7 +13,7 @@ cabal.mkDerivation (self: {
   buildDepends = [
     enumset eventList explicitException midi nonNegative transformers
   ];
-  pkgconfigDepends = [ jackaudio ];
+  pkgconfigDepends = [ jack2 ];
   meta = {
     homepage = "http://www.haskell.org/haskellwiki/JACK";
     description = "Bindings for the JACK Audio Connection Kit";