merge revision(s) 41468:

	test_fiber.rb: longer timeout

	* test/ruby/test_fiber.rb (test_many_fibers): make timeout longer.
  10sec is not sufficient.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@41499 b2dd03c8-39d4-4d8f-98ff-823fe69b080e