test_sdbm.rb: only if SDBM
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
test_sdbm.rb: only if SDBM
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41489 b2dd03c8-39d4-4d8f-98ff-823fe69b080e