python: update 3.8.5 -> 3.9.0

Drop 0001-Do-not-hardcode-lib-as-location-for-site-packages-an.patch,
0001-configure.ac-fix-LIBPL.patch and 0001-python3-Do-not-hardcode-lib-for-distutils.patch
as they are all replaced by the new --platlibdir option to ./configure

Rename 0001-Lib-sysconfig.py-fix-another-place-where-lib-is-hard.patch to
0001-Lib-sysconfig.py-use-libdir-values-from-configuratio.patch
and describe the changes better.

License-Update: documentation now dual license under PSF & BSD
(not relevant for the recipe.
(From OE-Core rev: 7347556b18b45c5f9afc2cade565a75c95876914)

Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/python/python3/0001-Use-FLAG_REF-always-for-interned-strings.patch

@@ -1,19 +1,20 @@
-From 6c8ea7c1dacd42f3ba00440231ec0e6b1a38300d Mon Sep 17 00:00:00 2001
+From 9f63e83b1cec872917647b11155edaffe399d103 Mon Sep 17 00:00:00 2001
 From: Inada Naoki <songofacandy@gmail.com>
 Date: Sat, 14 Jul 2018 00:46:11 +0900
 Subject: [PATCH] Use FLAG_REF always for interned strings
 
 Upstream-Status: Submitted [https://github.com/python/cpython/pull/8226]
 Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
+
 ---
  Python/marshal.c | 9 +++++++--
  1 file changed, 7 insertions(+), 2 deletions(-)
 
 diff --git a/Python/marshal.c b/Python/marshal.c
-index 6d06266c6a..51db2e3b2e 100644
+index c4538bd..2437160 100644
 --- a/Python/marshal.c
 +++ b/Python/marshal.c
-@@ -275,9 +275,14 @@ w_ref(PyObject *v, char *flag, WFILE *p)
+@@ -298,9 +298,14 @@ w_ref(PyObject *v, char *flag, WFILE *p)
      if (p->version < 3 || p->hashtable == NULL)
          return 0; /* not writing object references */
  
@@ -28,8 +29,5 @@ index 6d06266c6a..51db2e3b2e 100644
          return 0;
 +    }
  
-     entry = _Py_HASHTABLE_GET_ENTRY(p->hashtable, v);
+     entry = _Py_hashtable_get_entry(p->hashtable, v);
      if (entry != NULL) {
--- 
-2.21.0
-