treewide: use scons setup hook

Lots of packages can use it. Here is the list:

- jackmix
- klick
- mixx
- nova-filters
- rhvoice
- giv
- mypaint
- swift-im
- bombono
- mapnik
- serf
- nuitka
- pyexiv2
- godot
- hammer
- toluapp
- btanks
- dxx-rebirth
- endless-sky
- globulation
- the-powder-toy
- fceux
- gpsd
- mongodb
- rippled
- mariadb
- lprof

pkgs/applications/audio/klick/default.nix

@@ -12,15 +12,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ scons libsamplerate libsndfile liblo libjack2 boost ];
+  prefixKey = "PREFIX=";
   NIX_CFLAGS_COMPILE = "-fpermissive";
 
-  buildPhase = ''
-    mkdir -p $out
-    scons PREFIX=$out
-  '';
-
-  installPhase = "scons install";
-
   meta = {
     homepage = http://das.nasophon.de/klick/;
     description = "Advanced command-line metronome for JACK";
@@ -28,4 +22,3 @@ stdenv.mkDerivation rec {
     platforms = stdenv.lib.platforms.linux;
   };
 }
-