uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/applications/science/math/pari/gp2c.nix

@@ -0,0 +1,34 @@
+{ lib
+, stdenv
+, fetchurl
+, pari
+, perl
+}:
+
+stdenv.mkDerivation rec {
+  pname = "gp2c";
+  version = "0.0.12";
+
+  src = fetchurl {
+    url = "https://pari.math.u-bordeaux.fr/pub/pari/GP2C/${pname}-${version}.tar.gz";
+    sha256 = "039ip7qkwwv46wrcdrz7y12m30kazzkjr44kqbc0h137g4wzd7zf";
+  };
+
+  buildInputs = [
+    pari
+    perl
+  ];
+
+  configureFlags = [
+    "--with-paricfg=${pari}/lib/pari/pari.cfg"
+    "--with-perl=${perl}/bin/perl"
+  ];
+
+  meta = with lib; {
+    description =  "A compiler to translate GP scripts to PARI programs";
+    homepage = "http://pari.math.u-bordeaux.fr/";
+    downloadPage = "http://pari.math.u-bordeaux.fr/download.html";
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ AndersonTorres ];
+  };
+}