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/text/gnused/default.nix

@@ -0,0 +1,39 @@
+{ lib, stdenv, fetchurl, perl }:
+
+stdenv.mkDerivation rec {
+  pname = "gnused";
+  version = "4.8";
+
+  src = fetchurl {
+    url = "mirror://gnu/sed/sed-${version}.tar.xz";
+    sha256 = "0cznxw73fzv1n3nj2zsq6nf73rvsbxndp444xkpahdqvlzz0r6zp";
+  };
+
+  outputs = [ "out" "info" ];
+
+  nativeBuildInputs = [ perl ];
+  preConfigure = "patchShebangs ./build-aux/help2man";
+
+  # Prevents attempts of running 'help2man' on cross-built binaries.
+  PERL = if stdenv.hostPlatform == stdenv.buildPlatform then null else "missing";
+
+  meta = {
+    homepage = "https://www.gnu.org/software/sed/";
+    description = "GNU sed, a batch stream editor";
+
+    longDescription = ''
+      Sed (stream editor) isn't really a true text editor or text
+      processor.  Instead, it is used to filter text, i.e., it takes
+      text input and performs some operation (or set of operations) on
+      it and outputs the modified text.  Sed is typically used for
+      extracting part of a file using pattern matching or substituting
+      multiple occurrences of a string within a file.
+    '';
+
+    license = lib.licenses.gpl3Plus;
+
+    platforms = lib.platforms.unix;
+    maintainers = with lib.maintainers; [ mic92 ];
+    mainProgram = "sed";
+  };
+}