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/text/papertrail/Gemfile

@@ -0,0 +1,4 @@
+# frozen_string_literal: true
+source "https://rubygems.org"
+
+gem "papertrail"

pkgs/tools/text/papertrail/Gemfile.lock

@@ -0,0 +1,17 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ansi (1.5.0)
+    chronic (0.10.2)
+    papertrail (0.10.1)
+      ansi (~> 1.5)
+      chronic (~> 0.10)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  papertrail
+
+BUNDLED WITH
+   2.1.4

pkgs/tools/text/papertrail/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, bundlerEnv, ruby, bundlerUpdateScript }:
+
+let
+  papertrail-env = bundlerEnv {
+    name = "papertrail-env";
+    inherit ruby;
+    gemfile = ./Gemfile;
+    lockfile = ./Gemfile.lock;
+    gemset = ./gemset.nix;
+  };
+in stdenv.mkDerivation {
+  pname = "papertrail";
+  version = (import ./gemset.nix).papertrail.version;
+
+  dontUnpack = true;
+
+  installPhase = ''
+    mkdir -p $out/bin
+    ln -s ${papertrail-env}/bin/papertrail $out/bin/papertrail
+  '';
+
+  passthru.updateScript = bundlerUpdateScript "papertrail";
+
+  meta = with lib; {
+    description = "Command-line client for Papertrail log management service";
+    homepage    = "https://github.com/papertrail/papertrail-cli/";
+    license     = licenses.mit;
+    maintainers = with maintainers; [ nicknovitski ];
+    platforms   = ruby.meta.platforms;
+  };
+}

pkgs/tools/text/papertrail/gemset.nix

@@ -0,0 +1,26 @@
+{
+  ansi = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "14ims9zfal4gs2wpx2m5rd8zsrl2k794d359shkrsgg3fhr2a22l";
+      type = "gem";
+    };
+    version = "1.5.0";
+  };
+  chronic = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1hrdkn4g8x7dlzxwb1rfgr8kw3bp4ywg5l4y4i9c2g5cwv62yvvn";
+      type = "gem";
+    };
+    version = "0.10.2";
+  };
+  papertrail = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0vb7bh7qh5hr4v3w711bl0yrr3rlhz5c3h3qx3fq31dr5y4100v7";
+      type = "gem";
+    };
+    version = "0.10.1";
+  };
+}