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/beats/default.nix

@@ -0,0 +1,23 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "beats";
+  version = "1.1";
+
+  src = fetchFromGitHub {
+    owner = "j0hax";
+    repo = "beats";
+    rev = "v${version}";
+    sha256 = "1rdvsqrjpily74y8vwch711401585xckb4p41cfwrmj6vf44jhif";
+  };
+
+  makeFlags = [ "PREFIX=$(out)" "CC=cc" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/j0hax/beats";
+    license = licenses.gpl3Only;
+    description = "Swatch Internet Time implemented as a C program";
+    platforms = platforms.all;
+    maintainers = [ maintainers.j0hax ];
+  };
+}