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/libxmp/default.nix

@@ -0,0 +1,23 @@
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "libxmp";
+  version = "4.5.0";
+
+  meta = with lib; {
+    description = "Extended module player library";
+    homepage    = "http://xmp.sourceforge.net/";
+    longDescription = ''
+      Libxmp is a library that renders module files to PCM data. It supports
+      over 90 mainstream and obscure module formats including Protracker (MOD),
+      Scream Tracker 3 (S3M), Fast Tracker II (XM), and Impulse Tracker (IT).
+    '';
+    license     = licenses.lgpl21Plus;
+    platforms   = platforms.all;
+  };
+
+  src = fetchurl {
+    url = "mirror://sourceforge/xmp/libxmp/${pname}-${version}.tar.gz";
+    sha256 = "sha256-eEfSYhEtFOhEL0TlrG7Z3bylTCUShHILVjyFKzHybnU=";
+  };
+}