Fix FreeBSD test failure.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31605 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Fix FreeBSD test failure.
use ps -o command instead of ps -o cmd. FreeBSD doesn't support
-o cmd option.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31605 b2dd03c8-39d4-4d8f-98ff-823fe69b080e