Add CPython 3.5.8rc1 (#1406)

plugins/python-build/share/python-build/3.5.8rc1

@@ -0,0 +1,9 @@
+#require_gcc
+prefer_openssl11
+install_package "openssl-1.1.0j" "https://www.openssl.org/source/openssl-1.1.0j.tar.gz#31bec6c203ce1a8e93d5994f4ed304c63ccf07676118b6634edded12ad1b3246" mac_openssl --if has_broken_mac_openssl
+install_package "readline-8.0" "https://ftpmirror.gnu.org/readline/readline-8.0.tar.gz#e339f51971478d369f8a053a330a190781acb9864cf4c541060f12078948e461" mac_readline --if has_broken_mac_readline
+if has_tar_xz_support; then
+  install_package "Python-3.5.8rc1" "https://www.python.org/ftp/python/3.5.8/Python-3.5.8rc1.tar.xz#4ebf6c2b432064d68cd6804fde7bb6a2df567776b74205d9636a5ea6e4f3122a" ldflags_dirs standard verify_py35 ensurepip
+else
+  install_package "Python-3.5.8rc1" "https://www.python.org/ftp/python/3.5.8/Python-3.5.8rc1.tgz#fd80351d0f2a08f102e33eb1b24e6dfb8c755f11928abc05ccae480321ffd13a" ldflags_dirs standard verify_py35 ensurepip
+fi