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/ffms/default.nix

@@ -0,0 +1,51 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, autoreconfHook
+, pkg-config
+, ffmpeg_4
+, zlib
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ffms";
+  version = "2.40";
+
+  src = fetchFromGitHub {
+    owner = "FFMS";
+    repo = "ffms2";
+    rev = version;
+    sha256 = "sha256-3bPxt911T0bGpAIS2RxBjo+VV84xW06eKcCj3ZAcmvw=";
+  };
+
+  NIX_CFLAGS_COMPILE = "-fPIC";
+
+  nativeBuildInputs = [
+    autoreconfHook
+    pkg-config
+  ];
+
+  preAutoreconf = ''
+    mkdir src/config
+  '';
+
+  buildInputs = [
+    ffmpeg_4
+    zlib
+  ];
+
+  # ffms includes a built-in vapoursynth plugin, see:
+  # https://github.com/FFMS/ffms2#avisynth-and-vapoursynth-plugin
+  postInstall = ''
+    mkdir $out/lib/vapoursynth
+    ln -s $out/lib/libffms2.so $out/lib/vapoursynth/libffms2.so
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/FFMS/ffms2/";
+    description = "FFmpeg based source library for easy frame accurate access";
+    license = licenses.mit;
+    maintainers = with maintainers; [ tadeokondrak ];
+    platforms = platforms.unix;
+  };
+}