Fix "/usr/lib/ruby/vendor_ruby/2.3.0/Qt/qtruby4.rb:187:in `find_pclassid'" when running rspec.
Fix "/usr/lib/ruby/vendor_ruby/2.3.0/Qt/qtruby4.rb:187:in `find_pclassid'" when running rspec.

wedesoft/arduino-mearm,wedesoft/arduino-mearm