- remove dispatch file for host.def, it is no longer used
- fix broken sparc64 check (from Per Øyvind Karlsen, #27277)
- fix broken check for rpm/macros.d directory (from Per Øyvind Karlsen)
- add mips support (from Arnaud Patard)
- add armel support (from Arnaud Patard)
- add additional guards for some interfering definitions in
  multiarch-dispatch.h (reported by Jérôme Brenier)