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/os-specific/darwin/darling/default.nix

@@ -0,0 +1,51 @@
+{stdenv, lib, fetchzip}:
+
+stdenv.mkDerivation rec {
+  pname = "darling";
+  name = pname;
+
+  src = fetchzip {
+    url = "https://github.com/darlinghq/darling/archive/d2cc5fa748003aaa70ad4180fff0a9a85dc65e9b.tar.gz";
+    sha256 = "11b51fw47nl505h63bgx5kqiyhf3glhp1q6jkpb6nqfislnzzkrf";
+    postFetch = ''
+      # The archive contains both `src/opendirectory` and `src/OpenDirectory`,
+      # pre-create the directory to choose the canonical case on
+      # case-insensitive filesystems.
+      mkdir -p $out/src/OpenDirectory
+
+      cd $out
+      tar -xzf $downloadedFile --strip-components=1
+      rm -r $out/src/libm
+
+      # If `src/opendirectory` and `src/OpenDirectory` refer to different
+      # things, then combine them into `src/OpenDirectory` to match the result
+      # on case-insensitive filesystems.
+      if [ "$(stat -c %i src/opendirectory)" != "$(stat -c %i src/OpenDirectory)" ]; then
+        mv src/opendirectory/* src/OpenDirectory/
+        rmdir src/opendirectory
+      fi
+    '';
+  };
+
+  # only packaging sandbox for now
+  buildPhase = ''
+    cc -c src/sandbox/sandbox.c -o src/sandbox/sandbox.o
+    cc -dynamiclib -flat_namespace src/sandbox/sandbox.o -o libsystem_sandbox.dylib
+  '';
+
+  installPhase = ''
+    mkdir -p $out/lib
+    cp -rL src/sandbox/include/ $out/
+    cp libsystem_sandbox.dylib $out/lib/
+
+    mkdir -p $out/include
+    cp src/libaks/include/* $out/include
+  '';
+
+  meta = with lib; {
+    maintainers = with maintainers; [ matthewbauer ];
+    license = licenses.gpl3;
+    description = "Darwin/macOS emulation layer for Linux";
+    platforms = platforms.darwin;
+  };
+}