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/genann/default.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "genann";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "codeplea";
+    repo = "genann";
+    rev = "v${version}";
+    sha256 = "0z45ndpd4a64i6jayr4yxfcr5h87bsmhm7lfgnbp35pnfywiclmq";
+  };
+
+  dontBuild = true;
+  doCheck = true;
+
+  # Nix doesn't seem to recognize this by default.
+  checkPhase = ''
+    make check
+  '';
+
+  installPhase = ''
+    mkdir -p $out/include
+    cp ./genann.{h,c} $out/include
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/codeplea/genann";
+    description = "Simple neural network library in ANSI C";
+    license = licenses.zlib;
+    maintainers = [ maintainers.ivar ];
+    platforms = platforms.all;
+  };
+}