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/system/openseachest/default.nix

@@ -0,0 +1,38 @@
+{ lib
+, fetchFromGitHub
+, stdenv
+}:
+
+stdenv.mkDerivation rec {
+  pname = "openseachest";
+  version = "21.06.21";
+
+  src = fetchFromGitHub {
+    owner = "Seagate";
+    repo = "openSeaChest";
+    rev = "v${version}";
+    sha256 = "09xay3frk0yh48ww650dsjp0rx0w1m3ab3rpz5k1jizppv4kk9fi";
+    fetchSubmodules = true;
+  };
+
+  makeFlags = [ "-C Make/gcc" ];
+  buildFlags = [ "release" ];
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/{bin,share}
+    cp -r Make/gcc/openseachest_exes/. $out/bin
+    cp -r docs/man $out/share
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "A collection of command line diagnostic tools for storage devices";
+    homepage = "https://github.com/Seagate/openSeaChest";
+    license = licenses.mpl20;
+    maintainers = with maintainers; [ justinas ];
+    platforms = with platforms; freebsd ++ linux;
+  };
+}