Merge pull request #630 from zmwangx/cpython-3.6.0a2

Add CPython 3.6.0a2

plugins/python-build/share/python-build/3.6.0a2

@@ -0,0 +1,4 @@
+#require_gcc
+install_package "openssl-1.0.2g" "https://www.openssl.org/source/openssl-1.0.2g.tar.gz#b784b1b3907ce39abf4098702dade6365522a253ad1552e267a9a0e89594aa33" mac_openssl --if has_broken_mac_openssl
+install_package "readline-6.3" "http://ftpmirror.gnu.org/readline/readline-6.3.tar.gz#56ba6071b9462f980c5a72ab0023893b65ba6debb4eeb475d7a563dc65cafd43" standard --if has_broken_mac_readline
+install_package "Python-3.6.0a2" "https://www.python.org/ftp/python/3.6.0/Python-3.6.0a2.tgz#66600469e7938b6476e5caaa5a77eafe298877ad81896243970b724c1e6a0401" ldflags_dirs standard verify_py36 ensurepip