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/audio/midicsv/default.nix

@@ -0,0 +1,25 @@
+{ lib, stdenv, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "midicsv";
+  version = "1.1";
+
+  src = fetchurl {
+    url = "http://www.fourmilab.ch/webtools/midicsv/midicsv-${version}.tar.gz";
+    sha256 = "1vvhk2nf9ilfw0wchmxy8l13hbw9cnpz079nsx5srsy4nnd78nkw";
+  };
+
+  postPatch = ''
+    substituteInPlace Makefile \
+      --replace /usr/local $out \
+      --replace gcc "${stdenv.cc.targetPrefix}cc"
+  '';
+
+  meta = with lib; {
+    description = "Losslessly translate MIDI to CSV and back";
+    homepage = "http://www.fourmilab.ch/webtools/midicsv/";
+    license = licenses.publicDomain;
+    maintainers = with maintainers; [ orivej ];
+    platforms = platforms.all;
+  };
+}