Add CPython v3.8.12 (#2043)

plugins/python-build/share/python-build/3.8.12

@@ -0,0 +1,10 @@
+#require_gcc
+prefer_openssl11
+export PYTHON_BUILD_CONFIGURE_WITH_OPENSSL=1
+install_package "openssl-1.1.1k" "https://www.openssl.org/source/openssl-1.1.1k.tar.gz#892a0875b9872acd04a9fde79b1f943075d5ea162415de3047c327df33fbaee5" mac_openssl --if has_broken_mac_openssl
+install_package "readline-8.1" "https://ftpmirror.gnu.org/readline/readline-8.1.tar.gz#f8ceb4ee131e3232226a17f51b164afc46cd0b9e6cef344be87c65962cb82b02" mac_readline --if has_broken_mac_readline
+if has_tar_xz_support; then
+  install_package "Python-3.8.12" "https://www.python.org/ftp/python/3.8.12/Python-3.8.12.tar.xz#b1d3a76420375343b5e8a22fceb1ac65b77193e9ed27146524f0a9db058728ea" standard verify_py38 copy_python_gdb ensurepip
+else
+  install_package "Python-3.8.12" "https://www.python.org/ftp/python/3.8.12/Python-3.8.12.tgz#316aa33f3b7707d041e73f246efedb297a70898c4b91f127f66dc8d80c596f1a" standard verify_py38 copy_python_gdb ensurepip
+fi