Merge remote-tracking branch 'qatar/master'

* qatar/master:
  fate: fix dependencies on SAMPLES being set
  fate: remove unnecessary libavfilter dependency

Conflicts:
	ffmpeg.c
	tests/Makefile
	tests/fate/aac.mak
	tests/fate/audio.mak
	tests/fate/demux.mak
	tests/fate/ea.mak
	tests/fate/image.mak
	tests/fate/lossless-audio.mak
	tests/fate/lossless-video.mak
	tests/fate/microsoft.mak
	tests/fate/mpc.mak
	tests/fate/probe.mak
	tests/fate/qt.mak
	tests/fate/real.mak
	tests/fate/screen.mak
	tests/fate/video.mak
	tests/fate/voice.mak
	tests/fate/vqf.mak
	tests/ref/fate/idroq-video-encode
	tests/ref/fate/vc1-ism

Merged-by: Michael Niedermayer <michaelni@gmx.at>