Ruby

make-snapshot: no loading unexpected libraries

• tool/make-snapshot (package): get rid of loading unbundled and
  unexpected libraries. [ruby-core:67977] [Bug #10822]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49551 b2dd03c8-39d4-4d8f-98ff-823fe69b080e