spec_helper.rb: pass jobserver fds
spec_helper.rb: pass jobserver fds

* spec/rubyspec/optional/capi/spec_helper.rb (compile_extension):
  pass jobserver fds explicitly, because other specs might have
  set close_on_exec flags on these fds.

git-svn-id: ab86ecd26fe50a6a239cacb71380e346f71cee7d@59475 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

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