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/embedded/platformio/chrootenv.nix

@@ -0,0 +1,48 @@
+{ lib, buildFHSUserEnv, version, src }:
+
+let
+  pio-pkgs = pkgs:
+    let
+      python = pkgs.python3.override {
+        packageOverrides = self: super: {
+          platformio = self.callPackage ./core.nix { inherit version src; };
+        };
+      };
+    in
+    (with pkgs; [
+      zlib
+      git
+      xdg-user-dirs
+    ]) ++ (with python.pkgs; [
+      python
+      setuptools
+      pip
+      bottle
+      platformio
+    ]);
+
+in
+buildFHSUserEnv {
+  name = "platformio";
+
+  targetPkgs = pio-pkgs;
+  # disabled temporarily because fastdiff no longer support 32bit
+  # multiPkgs = pio-pkgs;
+
+  meta = with lib; {
+    description = "An open source ecosystem for IoT development";
+    homepage = "https://platformio.org";
+    maintainers = with maintainers; [ mog ];
+    license = licenses.asl20;
+    platforms = with platforms; linux;
+  };
+
+  extraInstallCommands = ''
+    mkdir -p $out/lib/udev/rules.d
+
+    ln -s $out/bin/platformio $out/bin/pio
+    ln -s ${src}/scripts/99-platformio-udev.rules $out/lib/udev/rules.d/99-platformio-udev.rules
+  '';
+
+  runScript = "platformio";
+}