Comment # 2 on bug 1069934 from Ludwig Nussel

well, that is not up to me. If you manage to get an rpm maintenance update
through it will also get into leap without needing any action nor approval by
my :-) An alternative might be an extra macro package with backported macros.
Richard also has a use case for it and if you update rpm for SLE 12 anyways, it
might be a chance to get that macro in also.