Ruby

rubygems/util.rb: fix Gem::Util.popen

• lib/rubygems/util.rb (Gem::Util.popen): should close open pipe to
  reap the child process, in 1.9 or later. fix deadlock on waiting
  the child process whose output is bigger than pipe buffer, in 1.8.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43724 b2dd03c8-39d4-4d8f-98ff-823fe69b080e