[ruby/f19] (7 commits) ...Bump release and add changelog entries.

[Vít Ondruch]

Summary of changes:

  cf21f05... Move the macros definition into macros.ruby file. (*)
  893a03a... Move RubyGems macro definition into macros.rubygems file. (*)
  cdb74fa... Fix %{gem_extdir_mri} preparation. (*)
  56d430e... Introduce %{gem_archdir} macro. (*)
  4f6b4d4... Filter automatically generated provides of private librarie (*)
  c0b1859... Add %{ruby_default_filter} macro. (*)
  ec04753... Bump release and add changelog entries. (*)

(*) This commit already existed in another branch; no separate mail sent