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/tools/security/ssss/default.nix

@@ -0,0 +1,45 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, gmp
+, installShellFiles
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ssss";
+  version = "0.5.7";
+
+  src = fetchFromGitHub {
+    owner = "MrJoy";
+    repo = pname;
+    rev = "releases%2Fv${version}";
+    sha256 = "18r1hwch6nq6gjijavr4pvrxz2plrlrvdx8ssqhdj2vmqvlqwbvd";
+  };
+
+  nativeBuildInputs = [
+    installShellFiles
+  ];
+
+  buildInputs = [
+    gmp
+  ];
+
+  preBuild = ''
+    sed -e s@/usr/@$out/@g -i Makefile
+    cp ssss.manpage.xml ssss.1
+    mkdir -p $out/bin
+    echo -e 'install:\n\tcp ssss-combine ssss-split '"$out"'/bin' >>Makefile
+  '';
+
+  postInstall = ''
+    installManPage ssss.1
+  '';
+
+  meta = with lib; {
+    description = "Shamir Secret Sharing Scheme";
+    homepage = "http://point-at-infinity.org/ssss/";
+    license = licenses.gpl2Plus;
+    platforms = platforms.unix;
+    maintainers = with maintainers; [ ];
+  };
+}