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/misc/sailsd/default.nix

@@ -0,0 +1,48 @@
+{ lib, stdenv, fetchFromGitHub, pkg-config, jansson }:
+
+let
+  libsailing = fetchFromGitHub {
+    owner = "sails-simulator";
+    repo = "libsailing";
+    rev = "9b2863ff0c539cd23d91b0254032a7af9c840574";
+    sha256 = "06rcxkwgms9sxqr1swnnc4jnvgs0iahm4cksd475yd1bp5p1gq6j";
+  };
+in
+stdenv.mkDerivation rec {
+  version = "0.3.0";
+  pname = "sailsd";
+  src = fetchFromGitHub {
+    owner = "sails-simulator";
+    repo = "sailsd";
+    rev = version;
+    sha256 = "1s4nlffp683binbdxwwzbsci61kbjylbcr1jf44sv1h1r5d5js05";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ jansson libsailing ];
+
+  INSTALL_PATH = "$(out)";
+
+  postUnpack = ''
+    rmdir $sourceRoot/libsailing
+    cp -r ${libsailing} $sourceRoot/libsailing
+    chmod 755 -R $sourceRoot/libsailing
+  '';
+
+  patchPhase = ''
+    substituteInPlace Makefile \
+      --replace gcc cc
+  '';
+
+  meta = with lib; {
+    description = "Simulator daemon for autonomous sailing boats";
+    homepage = "https://github.com/sails-simulator/sailsd";
+    license = licenses.gpl3;
+    longDescription = ''
+      Sails is a simulator designed to test the AI of autonomous sailing
+      robots. It emulates the basic physics of sailing a small single sail
+      boat'';
+    maintainers = with maintainers; [ kragniz ];
+    platforms = platforms.all;
+  };
+}