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/misc/ledit/default.nix

@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchzip, ocaml, camlp5}:
+
+stdenv.mkDerivation {
+  pname = "ledit";
+  version = "2.04";
+
+  src = fetchzip {
+    url = "http://pauillac.inria.fr/~ddr/ledit/distrib/src/ledit-2.04.tgz";
+    sha512 = "16vlv6rcsddwrvsqqiwxdfv5rxvblhrx0k84g7pjibi0an241yx8aqf8cj4f4sgl5xfs3frqrdf12zqwjf2h4jvk8jyhyar8n0nj3g0";
+  };
+
+  preBuild = ''
+    mkdir -p $out/bin
+    substituteInPlace Makefile --replace /bin/rm rm --replace BINDIR=/usr/local/bin BINDIR=$out/bin
+  '';
+
+  buildInputs = [
+    ocaml
+    camlp5
+  ];
+
+  meta = with lib; {
+    homepage = "http://pauillac.inria.fr/~ddr/ledit/";
+    description = "A line editor, allowing to use shell commands with control characters like in emacs";
+    license = licenses.bsd3;
+    maintainers = [ maintainers.delta ];
+    broken = lib.versionOlder ocaml.version "4.03";
+  };
+}