enable RDP on appveyor for debugging

Author: ianfixes

appveyor.yml

@@ -22,6 +22,6 @@ test_script:
   - bundle exec rubocop --version
   - bundle exec rubocop -D .
   - bundle exec rspec
-  - cd SampleProjects\TestSomething
-  - bundle install
-  - bundle exec arduino_ci_remote.rb
+
+on_finish:
+  - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))