platformio: Patch warning about missing udev rules

This adds the sentence "On NixOS add the platformio package to
services.udev.packages" to the warning.

pkgs/development/arduino/platformio/core.nix

@@ -82,6 +82,7 @@ in buildPythonApplication rec {
   patches = [
     ./fix-searchpath.patch
     ./use-local-spdx-license-list.patch
+    ./missing-udev-rules-nixos.patch
   ];
 
   postPatch = ''

pkgs/development/arduino/platformio/missing-udev-rules-nixos.patch

@@ -0,0 +1,14 @@
+diff --git a/platformio/exception.py b/platformio/exception.py
+index d291ad7f..4761a35b 100644
+--- a/platformio/exception.py
++++ b/platformio/exception.py
+@@ -195,7 +195,8 @@ class MissedUdevRules(InvalidUdevRules):
+ 
+     MESSAGE = (
+         "Warning! Please install `99-platformio-udev.rules`. \nMode details: "
+-        "https://docs.platformio.org/en/latest/faq.html#platformio-udev-rules"
++        "https://docs.platformio.org/en/latest/faq.html#platformio-udev-rules\n"
++        "On NixOS add the platformio package to services.udev.packages"
+     )
+ 
+