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/os-specific/linux/ell/default.nix

@@ -0,0 +1,44 @@
+{ lib, stdenv
+, fetchgit
+, autoreconfHook
+, pkg-config
+, dbus
+}:
+
+stdenv.mkDerivation rec {
+  pname = "ell";
+  version = "0.50";
+
+  outputs = [ "out" "dev" ];
+
+  src = fetchgit {
+    url = "https://git.kernel.org/pub/scm/libs/ell/ell.git";
+    rev = version;
+    sha256 = "sha256-LQAbE/pAKjVFsn9FjIbvY6sTBcVBdi4LCOnDVZ/WGV0=";
+  };
+
+  nativeBuildInputs = [
+    pkg-config
+    autoreconfHook
+  ];
+
+  checkInputs = [
+    dbus
+  ];
+
+  enableParallelBuilding = true;
+
+  doCheck = true;
+
+  meta = with lib; {
+    homepage = "https://git.kernel.org/pub/scm/libs/ell/ell.git";
+    description = "Embedded Linux Library";
+    longDescription = ''
+      The Embedded Linux* Library (ELL) provides core, low-level functionality for system daemons. It typically has no dependencies other than the Linux kernel, C standard library, and libdl (for dynamic linking). While ELL is designed to be efficient and compact enough for use on embedded Linux platforms, it is not limited to resource-constrained systems.
+    '';
+    changelog = "https://git.kernel.org/pub/scm/libs/ell/ell.git/tree/ChangeLog?h=${version}";
+    license = licenses.lgpl21Plus;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ mic92 dtzWill maxeaubrey ];
+  };
+}