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/libraries/liberio/default.nix

@@ -0,0 +1,38 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, autoreconfHook
+, systemd
+, pkg-config
+}:
+
+stdenv.mkDerivation rec {
+  pname = "liberio";
+  version = "unstable-2019-12-11";
+
+  src = fetchFromGitHub {
+    owner = "EttusResearch";
+    repo = "liberio";
+    rev = "81777e500d1c3b88d5048d46643fb5553eb5f786";
+    sha256 = "1n40lj5g497mmqh14vahdhy3jwvcry2pkc670p4c9f1pggp6ysgk";
+  };
+
+  nativeBuildInputs = [
+    pkg-config
+    autoreconfHook
+  ];
+
+  buildInputs = [
+    systemd
+  ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Ettus Research DMA I/O Library";
+    homepage = "https://github.com/EttusResearch/liberio";
+    license = licenses.gpl2;
+    maintainers = [ maintainers.doronbehar ];
+    platforms = platforms.all;
+  };
+}