openssl: fix test failure on Fedora 23
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55224 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
openssl: fix test failure on Fedora 23
patch from RHEL disables it. The curve has to be chosen from: {
secp256k1, secp384r1, secp521r1, prime256v1 }.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55224 b2dd03c8-39d4-4d8f-98ff-823fe69b080e