* lib/rubygems/ssl_certs/AddTrustExternalCARoot{-2048,}.pem: add newer
  root CA for rubygems.org.  a part of r48389 of trunk.
  see also https://github.com/rubygems/rubygems/commit/98f5f44c7141881c756003e4256b1a96b200b98e .
  [Backport #10516] [ruby-core:66303]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@48630 b2dd03c8-39d4-4d8f-98ff-823fe69b080e