* ext/openssl/ossl_rand.c: [DOC] Add rdoc for method descriptions
  By @vipulnsward [Fixes GH-657] https://github.com/ruby/ruby/pull/657


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47781 b2dd03c8-39d4-4d8f-98ff-823fe69b080e