test_etc.rb: relax comparisons
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49204 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_etc.rb: relax comparisons
comparisons. getgrent() does not return mem properly in some
circumstances (possibly, involved in Open Directory on OSX).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49204 b2dd03c8-39d4-4d8f-98ff-823fe69b080e