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/misc/pws/default.nix

@@ -0,0 +1,34 @@
+{ stdenv, lib, bundlerEnv, ruby, bundlerUpdateScript, xsel, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  pname = "pws";
+  version = (import ./gemset.nix).pws.version;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  dontUnpack = true;
+
+  installPhase = let
+    env = bundlerEnv {
+      name = "${pname}-gems";
+
+      inherit ruby;
+
+      gemdir = ./.;
+    };
+  in ''
+    mkdir -p $out/bin
+    makeWrapper ${env}/bin/pws $out/bin/pws \
+      --set PATH '"${xsel}/bin/:$PATH"'
+  '';
+
+  passthru.updateScript = bundlerUpdateScript "pws";
+
+  meta = with lib; {
+    description = "Command-line password safe";
+    homepage    = "https://github.com/janlelis/pws";
+    license     = licenses.mit;
+    maintainers = with maintainers; [ swistak35 nicknovitski ];
+    platforms   = platforms.unix;
+  };
+}