Migrate License field to SPDX identifiers

See https://fedoraproject.org/wiki/Changes/SPDX_Licenses_Phase_2

As per guidance, files which are not used by the build and not
included in the binary RPM were not includes in the new license.
That excluded a lot of sources in lib/, which are used for
portability but are not needed for modern glibc-based systems.

Note the m4/ sources are FSFULLR and pulled in via the configure
process and config.h.in.  While this is very indirect we include the
m4/ files as "sources" for the purposes of the license, to be
conservative.

make.spec

@@ -5,8 +5,8 @@
 Name: make
 Epoch: 1
 Version: 4.4.1
-Release: 2%{?dist}
+Release: 3%{?dist}
-License: GPLv3+
+License: GPL-3.0-or-later AND LGPL-2.1-or-later AND GFDL-1.3-or-later AND FSFULLR
 URL: http://www.gnu.org/software/make/
 Source: ftp://ftp.gnu.org/gnu/make/make-%{version}.tar.gz
 
@@ -134,6 +134,10 @@ echo ============END TESTING===========
 %{_includedir}/gnumake.h
 
 %changelog
+* Thu Jul 20 2023 DJ Delorie <dj@redhat.com> - 1:4.4.1-3
+- Migrate License field to SPDX identifiers for
+  https://fedoraproject.org/wiki/Changes/SPDX_Licenses_Phase_2
+
 * Thu Jul 20 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1:4.4.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild