thread.c: undumpable

* ext/thread/thread.c (undumpable): ConditionVariable and Queue
  are not dumpable.  [ruby-core:61677] [Bug #9674]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45423 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
marshal.c: undumpable hidden objects

* marshal.c (w_object): internal objects are not dumpable.
  [ruby-core:61677] [Bug #9674]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45424 b2dd03c8-39d4-4d8f-98ff-823fe69b080e