paxtest: refactoring

- Use standard phase hooks
- Install test helpers into $out/lib/paxtest instead of dumping
them into PATH
- Set PAXBIN=paxctl so that the appropriate pax flags are set

pkgs/os-specific/linux/paxtest/default.nix

···
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl, paxctl }:
 
 stdenv.mkDerivation rec {
   name    = "paxtest-${version}";
···
     sha256 = "0j40h3x42k5mr5gc5np4wvr9cdf9szk2f46swf42zny8rlgxiskx";
   };
 
-  buildPhase = ''
-    make $makeFlags RUNDIR=$out/bin/ linux
-  '';
+  enableParallelBuilding = true;
 
-  installPhase = ''
-    mkdir -p $out/bin
-    find . -executable -exec cp {} $out/bin \;
-  '';
+  makefile     = "Makefile.psm";
+  makeFlags    = [ "PAXBIN=${paxctl}/bin/paxctl" "BINDIR=$(out)/bin" "RUNDIR=$(out)/lib/paxtest" ];
+  installFlags = ''DESTDIR=""'';
 
   meta = with stdenv.lib; {
     description = "Test various memory protection measures";
     license     = licenses.gpl2;
     platforms   = platforms.linux;
-    maintainer  = [ maintainers.copumpkin ];
+    maintainer  = with maintainers; [ copumpkin joachifm ];
   };
 }
-