merge revision(s) 44544:

	* doc/NEWS-2.1.0: Add mention for litteral.freeze

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44556 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-01-11

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@44557 b2dd03c8-39d4-4d8f-98ff-823fe69b080e