merge revision(s) 44555:

	test_weakref.rb: find collected weakref

	* test/test_weakref.rb (test_recycled): retry and find a WeakRef
  whose the target is collected, to fix circumstance dependent.

git-svn-id: svn+ssh://svn.ruby-lang.org/ruby/branches/ruby_2_1@44850 b2dd03c8-39d4-4d8f-98ff-823fe69b080e