Ruby » Ruby master

merge revision(s) 61478: [Backport #14234]

    prelude.c.tmpl: get rid of errors with old gcc

    * template/prelude.c.tmpl: moved diagnostic pragmas outside
      prelude_eval() for very old gcc.  [ruby-core:84449] [Bug #14234]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_5@61496 b2dd03c8-39d4-4d8f-98ff-823fe69b080e