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/uniscribe/Gemfile

@@ -0,0 +1,3 @@
+source "https://rubygems.org"
+
+gem "uniscribe"

pkgs/tools/text/uniscribe/Gemfile.lock

@@ -0,0 +1,37 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    characteristics (1.4.0)
+      unicode-categories (~> 1.7)
+    paint (2.2.1)
+    rationalist (2.0.1)
+    symbolify (1.4.0)
+      characteristics (>= 0.8, < 2.0)
+    unicode-categories (1.7.0)
+    unicode-display_width (2.1.0)
+    unicode-emoji (2.9.0)
+      unicode-version (~> 1.0)
+    unicode-name (1.10.0)
+      unicode-types (~> 1.7)
+    unicode-sequence_name (1.10.0)
+    unicode-types (1.7.0)
+    unicode-version (1.1.0)
+    uniscribe (1.7.0)
+      characteristics (~> 1.4)
+      paint (>= 0.9, < 3.0)
+      rationalist (~> 2.0, >= 2.0.1)
+      symbolify (~> 1.4)
+      unicode-display_width (~> 2.1)
+      unicode-emoji (~> 2.9)
+      unicode-name (~> 1.10)
+      unicode-sequence_name (~> 1.10)
+      unicode-version (~> 1.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  uniscribe
+
+BUNDLED WITH
+   2.1.4

pkgs/tools/text/uniscribe/default.nix

@@ -0,0 +1,30 @@
+{ stdenv, lib, bundlerEnv, bundlerUpdateScript, makeWrapper }:
+
+let
+  rubyEnv = bundlerEnv {
+    name = "uniscribe";
+    gemdir = ./.;
+  };
+in
+stdenv.mkDerivation rec {
+  pname = "uniscribe";
+  version = (import ./gemset.nix).uniscribe.version;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  dontUnpack = true;
+
+  installPhase = ''
+    mkdir -p $out/bin
+    makeWrapper ${rubyEnv}/bin/uniscribe $out/bin/uniscribe
+  '';
+
+  passthru.updateScript = bundlerUpdateScript "uniscribe";
+
+  meta = with lib; {
+    description = "Explains Unicode characters/code points: Displays their name, category, and shows compositions";
+    homepage = "https://github.com/janlelis/uniscribe";
+    license = licenses.mit;
+    maintainers = with maintainers; [ kjeremy ];
+  };
+}