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/lwt-exit/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, fetchFromGitLab
+, buildDunePackage
+, lwt
+, ptime
+}:
+
+buildDunePackage rec {
+  pname = "lwt-exit";
+  version = "1.0";
+  src = fetchFromGitLab {
+    owner = "nomadic-labs";
+    repo = pname;
+    rev = "${version}";
+    sha256 = "1k763bmj1asj9ijar39rh3h1d59rckmsf21h2y8966lgglsf42bd";
+  };
+
+  useDune2 = true;
+
+  minimalOCamlVersion = "4.08";
+
+  propagatedBuildInputs = [
+    lwt
+    ptime
+  ];
+
+  # for some reason this never exits
+  doCheck = false;
+
+  meta = {
+    description = "An opinionated clean-exit and signal-handling library for Lwt programs";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.ulrikstrid ];
+  };
+}