* qatar/master:
  vp9: add a new segmentation sample.

Conflicts:
	tests/fate/vpx.mak
	tests/ref/fate/vp9-segmentation-aq-akiyo
	tests/ref/fate/vp9-segmentation-sf-akiyo

See: 65f41b5cMerged-by: Michael Niedermayer <michaelni@gmx.at>