Add CPython 3.8.10 (#1895)

Co-authored-by: Josh Friend <josh@fueledbycaffeine.com>

.github/workflows/ubuntu_tests.yml

@@ -5,7 +5,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [2.7.18, 3.5.10, 3.6.13, 3.7.10, 3.8.9, 3.9.5]  # 2.7.6, 3.4.10,
+        python-version:
+          - 2.7.18
+          - 3.5.10
+          - 3.6.13
+          - 3.7.10
+          - 3.8.10
+          - 3.9.5
     runs-on: Ubuntu-20.04
     steps:
       - uses: actions/checkout@v2

plugins/python-build/share/python-build/3.8.10

@@ -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-8.0" "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-3.8.10" "https://www.python.org/ftp/python/3.8.10/Python-3.8.10.tar.xz#6af24a66093dd840bcccf371d4044a3027e655cf24591ce26e48022bc79219d9" ldflags_dirs standard verify_py38 copy_python_gdb ensurepip
+else
+  install_package "Python-3.8.10" "https://www.python.org/ftp/python/3.8.10/Python-3.8.10.tgz#b37ac74d2cbad2590e7cd0dd2b3826c29afe89a734090a87bf8c03c45066cb65" ldflags_dirs standard verify_py38 copy_python_gdb ensurepip
+fi