configure.ac: write build/make/Makefile within an AC_CONFIG_FILE, not during main configure #21524
Description
build/make/Makefile should be written by config.status within an AC_CONFIG_FILE template, not at configure time.
Depends on #24729
Depends on #24703
Component: build: configure
Author: Erik Bray
Branch: 2a99185
Reviewer: Julian Rüth
Issue created by migration from https://trac.sagemath.org/ticket/21524