gc.c: flush all deferred finalizers
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43994 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
gc.c: flush all deferred finalizers
finalizers can get ready to run newly by lazy sweep.
[ruby-core:58833] [Bug #9205]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43994 b2dd03c8-39d4-4d8f-98ff-823fe69b080e