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/video/gpac/default.nix

@@ -0,0 +1,45 @@
+{ lib, stdenv, fetchFromGitHub, pkg-config, zlib }:
+
+stdenv.mkDerivation rec {
+  version = "2.0.0";
+  pname = "gpac";
+
+  src = fetchFromGitHub {
+    owner = "gpac";
+    repo = "gpac";
+    rev = "v${version}";
+    sha256 = "sha256-MIX32lSqf/lrz9240h4wMIQp/heUmwvDJz8WN08yf6c=";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile --replace 'dh_link' 'ln -s'
+  '';
+
+  # this is the bare minimum configuration, as I'm only interested in MP4Box
+  # For most other functionality, this should probably be extended
+  nativeBuildInputs = [ pkg-config ];
+
+  buildInputs = [ zlib ];
+
+  enableParallelBuilding = true;
+
+  meta = with lib; {
+    description = "Open Source multimedia framework for research and academic purposes";
+    longDescription = ''
+      GPAC is an Open Source multimedia framework for research and academic purposes.
+      The project covers different aspects of multimedia, with a focus on presentation
+      technologies (graphics, animation and interactivity) and on multimedia packaging
+      formats such as MP4.
+
+      GPAC provides three sets of tools based on a core library called libgpac:
+
+      A multimedia player, called Osmo4 / MP4Client,
+      A multimedia packager, called MP4Box,
+      And some server tools included in MP4Box and MP42TS applications.
+    '';
+    homepage = "https://gpac.wp.imt.fr";
+    license = licenses.lgpl21;
+    maintainers = with maintainers; [ bluescreen303 mgdelacroix ];
+    platforms = platforms.linux;
+  };
+}