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/default.nix

@@ -0,0 +1,42 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, fetchpatch
+, bison
+, flex
+, perl
+, gmp
+, mpfr
+, qtbase
+, enableGist ? true
+}:
+
+stdenv.mkDerivation rec {
+  pname = "gecode";
+  version = "6.2.0";
+
+  src = fetchFromGitHub {
+    owner = "Gecode";
+    repo = "gecode";
+    rev = "release-${version}";
+    sha256 = "0b1cq0c810j1xr2x9y9996p894571sdxng5h74py17c6nr8c6dmk";
+  };
+
+  patches = [
+    (import ./fix-const-weights-clang-patch.nix fetchpatch)
+  ];
+
+  enableParallelBuilding = true;
+  dontWrapQtApps = true;
+  nativeBuildInputs = [ bison flex ];
+  buildInputs = [ perl gmp mpfr ]
+    ++ lib.optional enableGist qtbase;
+
+  meta = with lib; {
+    license = licenses.mit;
+    homepage = "https://www.gecode.org";
+    description = "Toolkit for developing constraint-based systems";
+    platforms = platforms.all;
+    maintainers = [ ];
+  };
+}