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/libtoxcore/default.nix

@@ -0,0 +1,60 @@
+{ lib, stdenv, fetchFromGitHub, cmake, libsodium, ncurses, libopus, msgpack
+, libvpx, check, libconfig, pkg-config }:
+
+let
+  generic = { version, sha256 }:
+  stdenv.mkDerivation {
+    pname = "libtoxcore";
+    inherit version;
+
+    src = fetchFromGitHub {
+      owner  = "TokTok";
+      repo   = "c-toxcore";
+      rev    = "v${version}";
+      inherit sha256;
+    };
+
+    cmakeFlags = [
+      "-DBUILD_NTOX=ON"
+      "-DDHT_BOOTSTRAP=ON"
+      "-DBOOTSTRAP_DAEMON=ON"
+    ];
+
+    buildInputs = [
+      libsodium msgpack ncurses libconfig
+    ] ++ lib.optionals (!stdenv.isAarch32) [
+      libopus libvpx
+    ];
+
+    nativeBuildInputs = [ cmake pkg-config ];
+
+    doCheck = false; # hangs, tries to access the net?
+    checkInputs = [ check ];
+
+    postFixup =''
+      sed -i $out/lib/pkgconfig/*.pc \
+        -e "s|^libdir=.*|libdir=$out/lib|" \
+        -e "s|^includedir=.*|includedir=$out/include|"
+    '';
+
+    meta = with lib; {
+      broken = stdenv.isDarwin;
+      description = "P2P FOSS instant messaging application aimed to replace Skype";
+      homepage = "https://tox.chat";
+      license = licenses.gpl3Plus;
+      maintainers = with maintainers; [ peterhoeg ];
+      platforms = platforms.all;
+    };
+  };
+
+in {
+  libtoxcore_0_1 = generic {
+    version = "0.1.11";
+    sha256 = "1fya5gfiwlpk6fxhalv95n945ymvp2iidiyksrjw1xw95fzsp1ij";
+  };
+
+  libtoxcore_0_2 = generic {
+    version = "0.2.17";
+    sha256 = "sha256-SOI6QKOSt/EK9JDrSaV6CrD5sx8aYb5ZL3StYq8u/Dg=";
+  };
+}