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/development/libraries/gecode/3.nix

@@ -0,0 +1,33 @@
+{ lib
+, stdenv
+, fetchurl
+, fetchpatch
+, perl
+}:
+
+stdenv.mkDerivation rec {
+  pname = "gecode";
+  version = "3.7.3";
+
+  src = fetchurl {
+    url = "http://www.gecode.org/download/${pname}-${version}.tar.gz";
+    sha256 = "0k45jas6p3cyldgyir1314ja3174sayn2h2ly3z9b4dl3368pk77";
+  };
+
+  patches = [
+    (import ./fix-const-weights-clang-patch.nix fetchpatch)
+  ];
+
+  nativeBuildInputs = [ perl ];
+
+  preConfigure = "patchShebangs configure";
+
+  meta = with lib; {
+    broken = stdenv.isDarwin;
+    license = licenses.mit;
+    homepage = "https://www.gecode.org";
+    description = "Toolkit for developing constraint-based systems";
+    platforms = platforms.all;
+    maintainers = [ maintainers.manveru ];
+  };
+}