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/ocaml-modules/ocamlmake/default.nix

@@ -0,0 +1,30 @@
+{stdenv, lib, fetchurl}:
+
+let
+
+  version = "6.37.0";
+  sha256 = "99ff58080ed154cc4bd70f915fe4760dffb026a1c0447caa0b3bdb982b24b0a8";
+
+in stdenv.mkDerivation {
+  pname = "ocaml-make";
+  inherit version;
+
+  src = fetchurl {
+    url = "https://bitbucket.org/mmottl/ocaml-makefile/downloads/ocaml-makefile-${version}.tar.gz";
+    inherit sha256;
+  };
+
+  installPhase = ''
+    mkdir -p "$out/include/"
+    cp OCamlMakefile "$out/include/"
+  '';
+
+  setupHook = ./setup-hook.sh;
+
+  meta = {
+    homepage = "http://www.ocaml.info/home/ocaml_sources.html";
+    description = "Generic OCaml Makefile for GNU Make";
+    license = "LGPL";
+    platforms = lib.platforms.unix;
+  };
+}

pkgs/development/ocaml-modules/ocamlmake/setup-hook.sh

@@ -0,0 +1,5 @@
+addOcamlMakefile () {
+    export OCAMLMAKEFILE="@out@/include/OCamlMakefile"
+}
+
+addEnvHooks "$targetOffset" addOcamlMakefile