Require RubyGems eagerly in #autoload specs
Require RubyGems eagerly in #autoload specs

* Working around an issue in MSpec where #require is defined on main,
  with the version of #require before the spec started.

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