[3.10] bpo-33393: Update config.guess and config.sub (GH-29781) (GH-29782)

Co-authored-by: Christian Heimes <christian@python.org>

Makefile.pre.in

@@ -2002,6 +2002,12 @@ patchcheck: @DEF_MAKE_RULE@
 check-limited-abi: all
 	$(RUNSHARED) ./$(BUILDPYTHON) $(srcdir)/Tools/scripts/stable_abi.py --all $(srcdir)/Misc/stable_abi.txt
 
+.PHONY: update-config
+update-config:
+	curl -sL -o config.guess 'https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD'
+	curl -sL -o config.sub 'https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD'
+	chmod +x config.guess config.sub
+
 # Dependencies
 
 Python/thread.o: @THREADHEADERS@ $(srcdir)/Python/condvar.h

Misc/NEWS.d/next/Build/2021-11-25-20-26-06.bpo-33393.24YNtM.rst

@@ -0,0 +1,3 @@
+Update ``config.guess`` to 2021-06-03 and ``config.sub`` to 2021-08-14.
+``Makefile`` now has an ``update-config`` target to make updating more
+convenient.