Add definition for Ruby 2.2.10

https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-2-10-released/

share/ruby-build/2.2.10

+install_package "openssl-1.0.2n" "https://www.openssl.org/source/openssl-1.0.2n.tar.gz#370babb75f278c39e0c50e8c4e7493bc0f18db6867478341a832a982fd15a8fe" mac_openssl --if has_broken_mac_openssl
+install_package "ruby-2.2.10" "https://cache.ruby-lang.org/pub/ruby/2.2/ruby-2.2.10.tar.bz2#a54204d2728283c9eff0cf81d654f245fa5b3447d0824f1a6bc3b2c5c827381e" warn_unsupported ldflags_dirs standard verify_openssl