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/build-managers/rake/Gemfile

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

pkgs/development/tools/build-managers/rake/Gemfile.lock

@@ -0,0 +1,13 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    rake (12.3.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  rake
+
+BUNDLED WITH
+   2.1.4

pkgs/development/tools/build-managers/rake/default.nix

@@ -0,0 +1,17 @@
+{ lib, bundlerApp, bundlerUpdateScript }:
+
+bundlerApp {
+  pname = "rake";
+  gemdir = ./.;
+  exes = [ "rake" ];
+
+  passthru.updateScript = bundlerUpdateScript "rake";
+
+  meta = with lib; {
+    description = "A software task management and build automation tool";
+    homepage = "https://github.com/ruby/rake";
+    license  = with licenses; mit;
+    maintainers = with maintainers; [ manveru nicknovitski ];
+    platforms = platforms.unix;
+  };
+}

pkgs/development/tools/build-managers/rake/gemset.nix

@@ -0,0 +1,12 @@
+{
+  rake = {
+    groups = ["default"];
+    platforms = [];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "1sy5a7nh6xjdc9yhcw31jji7ssrf9v5806hn95gbrzr998a2ydjn";
+      type = "gem";
+    };
+    version = "12.3.2";
+  };
+}