autoconf: Sync config.guess, config.sub with CPython repo

`config.sub.patch` is derived from:
python/cpython@bee7bb3
https://lists.gnu.org/archive/html/config-patches/2024-02/msg00001.html

Author: rhansen

autoconf/Dockerfile

@@ -3,6 +3,10 @@ FROM docker.io/library/ubuntu:24.04
 ARG AUTOCONF_VERSION="2.72"
 ARG AUTOCONF_ARCHIVE_VERSION="2023.02.20"
 ARG AUTOMAKE_VERSION="1.16.5"
+# Specific revisions of https://git.savannah.gnu.org/git/config.git
+# for config.guess and config.sub.
+ARG CONFIG_GUESS_REV="9428e344e65176b03b69e4bf4ed0d0fc51d4c26f"
+ARG CONFIG_SUB_REV="948ae97ca5703224bd3eada06b7a69f40dd15a02"
 
 LABEL org.opencontainers.image.source="https://github.com/python/cpython-devcontainers"
 LABEL org.opencontainers.image.base.name="docker.io/library/ubuntu:22.04"
@@ -40,6 +44,15 @@ RUN PATCH_VERBOSE=1 curl https://ftp.gnu.org/gnu/autoconf-archive/autoconf-archi
     && ./configure --prefix=/usr/local \
     && make \
     && make install
+ADD --chmod=755 https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=${CONFIG_GUESS_REV} \
+    /usr/local/share/autoconf/build-aux/config.guess
+ADD --chmod=755 https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=${CONFIG_SUB_REV} \
+    /usr/local/share/autoconf/build-aux/config.sub
+COPY config.sub.patch .
+RUN p=$(pwd)/config.sub.patch \
+    && cd /usr/local/share/autoconf/build-aux \
+    && patch -p1 <$p \
+    && rm "$p"
 
 # https://stackoverflow.com/questions/8811381/possibly-undefined-macro-ac-msg-error/49103418#49103418
 RUN cp /usr/local/share/aclocal/*.m4 /usr/share/aclocal \

autoconf/config.sub.patch

@@ -0,0 +1,63 @@
+From bee7bb3310b356e99e3a0f75f23efbc97f1b0a24 Mon Sep 17 00:00:00 2001
+From: Russell Keith-Magee <[email protected]>
+Date: Mon, 26 Feb 2024 09:21:10 +0800
+Subject: [PATCH] config.sub: Include support for arm64_32 and iOS/tvOS/watchOS
+ simulators
+
+  * Normalise the watchOS CPU architecture descriptor used by
+    Apple (`arm64_32`).
+  * Accept the `-simulator` suffix for descriptors for iOS, tvOS and
+    watchOS.
+
+The following is the list of compiler triples generated by Apple's
+clang toolchains for iOS 12.0, tvOS 9.0, and watchOS 4.0:
+
+  * `arm64-apple-ios12.0`
+  * `x86_64-apple-ios12.0-simulator`
+  * `arm64-apple-ios12.0-simulator`
+  * `arm64-apple-tvos9.0`
+  * `x86_64-apple-tvos9.0-simulator`
+  * `arm64-apple-tvos9.0-simulator`
+  * `arm64_32-apple-watchos4.0`
+  * `arm64-apple-watchos4.0-simulator`
+
+The `-simulator` suffix is significant because iOS devices and iOS
+simulators have a different ABI.  It is therefore essential that these
+can be differentiated in a compiler triple.
+---
+ config.sub | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/config.sub b/config.sub
+index 2c6a07a..1bb6a05 100755
+--- a/config.sub
++++ b/config.sub
+@@ -4,6 +4,7 @@
+ 
+ # shellcheck disable=SC2006,SC2268 # see below for rationale
+ 
++# Patched 2024-02-03 to include support for arm64_32 and iOS/tvOS/watchOS simulators
+ timestamp='2024-01-01'
+ 
+ # This file is free software; you can redistribute it and/or modify it
+@@ -1127,7 +1128,7 @@ case $cpu-$vendor in
+ 	xscale-* | xscalee[bl]-*)
+ 		cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
+ 		;;
+-	arm64-* | aarch64le-*)
++	arm64-* | aarch64le-* | arm64_32-*)
+ 		cpu=aarch64
+ 		;;
+ 
+@@ -1866,6 +1867,8 @@ case $kernel-$os-$obj in
+ 		;;
+ 	*-eabi*- | *-gnueabi*-)
+ 		;;
++	ios*-simulator- | tvos*-simulator- | watchos*-simulator- )
++		;;
+ 	none--*)
+ 		# None (no kernel, i.e. freestanding / bare metal),
+ 		# can be paired with an machine code file format
+-- 
+2.47.1
+