Merging pull request 2230

Signed-off-by: NLukáš Doktor <ldoktor@redhat.com>

* https://github.com/avocado-framework/avocado:
  MANIFEST.in: there are no longer YAML files under examples

MANIFEST.in

 include README.rst
 include LICENSE
 include Makefile
-include examples/*.yaml
 recursive-include selftests *