Fix ruby-Bugs-11513.
* ext/openssl/ossl_pkey_ec.c
New methods EC::Point.[eql,make_affine!,invert!,on_curve?,infinity?]
By default output the same key form as the openssl command.
* ext/openssl/ossl_rand.c
New method Random.status?
* test/openssl/test_ec.rb
New tests.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12571 b2dd03c8-39d4-4d8f-98ff-823fe69b080e