goruby.c: suppress warning

* goruby.c (goruby_options): check the result of `write(2)` to
  suppress unused-result warning.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47128 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
configure.in: remove SSE options

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47129 b2dd03c8-39d4-4d8f-98ff-823fe69b080e