Ruby

test: try File.symlink with invalid paths

• test (have_symlink?): try File.symlink with invalid paths to
  test the administrator privilege, nil just raises an
  ArgumentError before trying the actual API.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51719 b2dd03c8-39d4-4d8f-98ff-823fe69b080e