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/backup/lvmsync/Gemfile

@@ -0,0 +1,2 @@
+source 'https://rubygems.org/'
+gem 'lvmsync'

pkgs/tools/backup/lvmsync/Gemfile.lock

@@ -0,0 +1,19 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    git-version-bump (0.15.1)
+    lvmsync (3.3.2)
+      git-version-bump (~> 0.10)
+      treetop
+    polyglot (0.3.5)
+    treetop (1.6.9)
+      polyglot (~> 0.3)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  lvmsync
+
+BUNDLED WITH
+   2.1.4

pkgs/tools/backup/lvmsync/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, bundlerEnv, ruby, bundlerUpdateScript, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  pname = "lvmsync";
+  version = (import ./gemset.nix).${pname}.version;
+
+  buildInputs = [ makeWrapper ];
+
+  dontUnpack = true;
+
+  installPhase = let
+    env = bundlerEnv {
+      name = "${pname}-${version}-gems";
+      ruby = ruby;
+      gemfile  = ./Gemfile;
+      lockfile = ./Gemfile.lock;
+      gemset   = ./gemset.nix;
+    };
+  in ''
+    mkdir -p $out/bin
+    makeWrapper ${env}/bin/lvmsync $out/bin/lvmsync
+  '';
+
+  passthru.updateScript = bundlerUpdateScript "lvmsync";
+
+  meta = with lib; {
+    description = "Optimised synchronisation of LVM snapshots over a network";
+    homepage = "https://theshed.hezmatt.org/lvmsync/";
+    license = licenses.gpl3;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ jluttine nicknovitski ];
+  };
+
+}

pkgs/tools/backup/lvmsync/gemset.nix

@@ -0,0 +1,36 @@
+{
+  git-version-bump = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0xcj20gmbpqn2gcpid4pxpnimfdg2ip9jnl1572naz0magcrwl2s";
+      type = "gem";
+    };
+    version = "0.15.1";
+  };
+  lvmsync = {
+    dependencies = ["git-version-bump" "treetop"];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "02mdrvfibvab4p4yrdzxvndhy8drss3ri7izybcwgpbyc7isk8mv";
+      type = "gem";
+    };
+    version = "3.3.2";
+  };
+  polyglot = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1bqnxwyip623d8pr29rg6m8r0hdg08fpr2yb74f46rn1wgsnxmjr";
+      type = "gem";
+    };
+    version = "0.3.5";
+  };
+  treetop = {
+    dependencies = ["polyglot"];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0sdkd1v2h8dhj9ncsnpywmqv7w1mdwsyc5jwyxlxwriacv8qz8bd";
+      type = "gem";
+    };
+    version = "1.6.9";
+  };
+}