Skip the spec on Windows because RUBY_EXE is RUNRUBY and it calls ruby as grandchild
Skip the spec on Windows because RUBY_EXE is RUNRUBY and it calls ruby as grandchild

nobu/rubyspec,eregon/rubyspec,nobu/rubyspec,eregon/rubyspec,nobu/rubyspec,ruby/spec,ruby/spec,eregon/rubyspec,ruby/spec