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/tools/packer/default.nix

@@ -0,0 +1,39 @@
+{ lib
+, stdenv
+, buildGoModule
+, fetchFromGitHub
+, installShellFiles
+}:
+
+buildGoModule rec {
+  pname = "packer";
+  version = "1.8.1";
+
+  src = fetchFromGitHub {
+    owner = "hashicorp";
+    repo = "packer";
+    rev = "v${version}";
+    sha256 = "sha256-NqXmeBQrDnCGruJTZjAryxCmEdm1CZMPhW6JhZB0log=";
+  };
+
+  vendorSha256 = "sha256-Wit5DWTjVrxLLWpfOo/6JrSxqeZvC4Vjv+cW19wNHyw=";
+
+  subPackages = [ "." ];
+
+  ldflags = [ "-s" "-w" ];
+
+  nativeBuildInputs = [ installShellFiles ];
+
+  postInstall = ''
+    installShellCompletion --zsh contrib/zsh-completion/_packer
+  '';
+
+  meta = with lib; {
+    description = "A tool for creating identical machine images for multiple platforms from a single source configuration";
+    homepage    = "https://www.packer.io";
+    license     = licenses.mpl20;
+    maintainers = with maintainers; [ cstrahan zimbatm ma27 techknowlogick ];
+    changelog   = "https://github.com/hashicorp/packer/blob/v${version}/CHANGELOG.md";
+    platforms   = platforms.unix;
+  };
+}