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/libxnd/default.nix

@@ -0,0 +1,47 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, libndtypes
+}:
+
+stdenv.mkDerivation {
+  pname = "libxnd";
+  version = "unstable-2019-08-01";
+
+  src = fetchFromGitHub {
+    owner = "xnd-project";
+    repo = "xnd";
+    rev = "6f305cd40d90b4f3fc2fe51ae144b433d186a6cc";
+    sha256 = "1n31d64qwlc7m3qkzbafhp0dgrvgvkdx89ykj63kll7r1n3yk59y";
+  };
+
+  buildInputs = [ libndtypes ];
+
+  # Override linker with cc (symlink to either gcc or clang)
+  # Library expects to use cc for linking
+  configureFlags = [
+      # Override linker with cc (symlink to either gcc or clang)
+      # Library expects to use cc for linking
+      "LD=${stdenv.cc.targetPrefix}cc"
+      # needed for tests
+      "--with-includes=${libndtypes}/include"
+      "--with-libs=${libndtypes}/lib"
+  ];
+
+  # other packages which depend on libxnd seem to expect overflow.h, but
+  # it doesn't seem to be included in the installed headers. for now this
+  # works, but the generic name of the header could produce problems
+  # with collisions down the line.
+  postInstall = ''
+    cp libxnd/overflow.h $out/include/overflow.h
+  '';
+
+  doCheck = true;
+
+  meta = {
+    description = "C library for managing typed memory blocks and Python container module";
+    homepage = "https://xnd.io/";
+    license = lib.licenses.bsdOriginal;
+    maintainers = with lib.maintainers; [ costrouc ];
+  };
+}