rpmfilename must be constructed using rpmmacros

Different subpackages have different names so, at the least, the %NAME
macros must be used when constructing the rpmfilename.  Otherwise each
subsequent subpackage will overwrite the previous one.

This reinstates dag's fix from d4b6aecd97

Fixes #62673

Makefile

@@ -301,7 +301,7 @@ rpm: rpmcommon
 	--define "_srcrpmdir %{_topdir}" \
 	--define "_specdir $(RPMSPECDIR)" \
 	--define "_sourcedir %{_topdir}" \
-	--define "_rpmfilename $(RPMNVR).%%{ARCH}.rpm" \
+	--define "_rpmfilename %%{NAME}-%%{VERSION}-%%{RELEASE}.%%{ARCH}.rpm" \
 	--define "__python `which $(PYTHON)`" \
 	--define "upstream_version $(VERSION)" \
 	--define "rpmversion $(RPMVERSION)" \