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/mp3cat/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "mp3cat";
+  version = "0.5";
+
+  src = fetchFromGitHub {
+    owner = "tomclegg";
+    repo = pname;
+    rev = version;
+    sha256 = "0n6hjg2wgd06m561zc3ib5w2m3pwpf74njv2b2w4sqqh5md2ymfr";
+  };
+
+  makeFlags = [
+    "PREFIX=${placeholder "out"}"
+  ];
+
+  installTargets = [
+    "install_bin"
+  ];
+
+  meta = with lib; {
+    description = "A command line program which concatenates MP3 files";
+    longDescription = ''
+      A command line program which concatenates MP3 files, mp3cat
+      only outputs MP3 frames with valid headers, even if there is extra garbage
+      in its input stream
+    '';
+    homepage = "https://github.com/tomclegg/mp3cat";
+    license = licenses.gpl2;
+    maintainers = [ maintainers.omnipotententity ];
+    platforms = platforms.all;
+  };
+}