python3: Update to 3.8.4, refresh/rework patches, backport patches

This version includes fixes for:
* CVE-2020-14422: Hash collisions in IPv4Interface and IPv6Interface
* CVE-2020-15523: Python uses invalid DLL path after calling Py_SetPath
  on Windows

This version also includes support for OpenSSL 1.1.x builds that use
'no-deprecated' and '--api=1.1.0'[1], and so this removes the previous
OpenSSL-related patches.

This also backports fixes for security issues, including:
* CVE-2019-20907: Infinite loop in the tarfile module

This also updates the setuptools and pip packages to 47.1.0 and 20.1.1,
respectively.

[1]: https://github.com/python/cpython/pull/20566

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

lang/python/python3/Makefile

@@ -11,12 +11,12 @@ include $(TOPDIR)/rules.mk
 include ../python3-version.mk
 
 PKG_NAME:=python3
-PKG_RELEASE:=3
+PKG_RELEASE:=1
 PKG_VERSION:=$(PYTHON3_VERSION).$(PYTHON3_VERSION_MICRO)
 
 PKG_SOURCE:=Python-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://www.python.org/ftp/python/$(PKG_VERSION)
-PKG_HASH:=dfab5ec723c218082fe3d5d7ae17ecbdebffa9a1aea4d64aa3a2ecdd2e795864
+PKG_HASH:=5f41968a95afe9bc12192d7e6861aab31e80a46c46fa59d3d837def6a4cd4d37
 
 PKG_MAINTAINER:=Alexandru Ardelean <ardeleanalex@gmail.com>, Jeffery To <jeffery.to@gmail.com>
 PKG_LICENSE:=Python/2.0
@@ -175,7 +175,7 @@ define Build/Compile/python3-setuptools
 		--ignore-installed \
 		--root=$(PKG_BUILD_DIR)/install-setuptools \
 		--prefix=/usr \
-		$(PKG_BUILD_DIR)/Lib/ensurepip/_bundled/setuptools-$(PYTHON3_SETUPTOOLS_VERSION)-py2.py3-none-any.whl
+		$(PKG_BUILD_DIR)/Lib/ensurepip/_bundled/setuptools-$(PYTHON3_SETUPTOOLS_VERSION)-py3-none-any.whl
 	$(call PatchDir,$(PKG_BUILD_DIR)/install-setuptools/usr/lib/python$(PYTHON3_VERSION)/site-packages,./patches-setuptools,)
 endef
 endif # CONFIG_PACKAGE_python3-setuptools