Ruby

test/unit.rb: close jobserver

• test/lib/test/unit.rb (Test::Unit::Parallel#flush_job_tokens):
  close jobserver auth fds aflter flush, not to release tokens
  more than acquired.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59110 b2dd03c8-39d4-4d8f-98ff-823fe69b080e