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/package-management/nix-pin/default.nix

@@ -0,0 +1,53 @@
+{ lib, pkgs, stdenv, fetchFromGitHub, mypy, python3, nix, git, makeWrapper
+, runtimeShell }:
+let self = stdenv.mkDerivation rec {
+  pname = "nix-pin";
+  version = "0.4.0";
+  src = fetchFromGitHub {
+    owner = "timbertson";
+    repo = "nix-pin";
+    rev = "version-${version}";
+    sha256 = "1pccvc0iqapms7kidrh09g5fdx44x622r5l9k7bkmssp3v4c68vy";
+  };
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ python3 mypy ];
+  checkPhase = ''
+    mypy bin/*
+  '';
+  installPhase = ''
+    mkdir "$out"
+    cp -r bin share "$out"
+    wrapProgram $out/bin/nix-pin \
+      --prefix PATH : "${lib.makeBinPath [ nix git ]}"
+  '';
+  passthru =
+    let
+      defaults = import "${self}/share/nix/defaults.nix";
+    in {
+      api = { pinConfig ? defaults.pinConfig }:
+        let impl = import "${self}/share/nix/api.nix" { inherit pkgs pinConfig; }; in
+        { inherit (impl) augmentedPkgs pins callPackage; };
+      updateScript = ''
+        #!${runtimeShell}
+        set -e
+        echo
+        cd ${toString ./.}
+        ${pkgs.nix-update-source}/bin/nix-update-source \
+          --prompt version \
+          --replace-attr version \
+          --set owner timbertson \
+          --set repo nix-pin \
+          --set type fetchFromGitHub \
+          --set rev 'version-{version}' \
+          --substitute rev 'version-''${{version}}' \
+          --modify-nix default.nix
+      '';
+    };
+  meta = with lib; {
+    homepage = "https://github.com/timbertson/nix-pin";
+    description = "nixpkgs development utility";
+    license = licenses.mit;
+    maintainers = [ maintainers.timbertson ];
+    platforms = platforms.all;
+  };
+}; in self