fate: Add proper dependencies in qt.mak

The output of make fate-list is identical to before.
Signed-off-by: Martin Storsjö <martin@martin.st>

tests/fate/qt.mak

-FATE_SAMPLES_AVCONV += fate-8bps
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, EIGHTBPS) += fate-8bps
 fate-8bps: CMD = framecrc -i $(SAMPLES)/8bps/full9iron-partial.mov -pix_fmt rgb24
 
-FATE_SAMPLES_AVCONV += fate-qdm2
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, QDM2) += fate-qdm2
 fate-qdm2: CMD = pcm -i $(SAMPLES)/qt-surge-suite/surge-2-16-B-QDM2.mov
 fate-qdm2: CMP = oneoff
 fate-qdm2: REF = $(SAMPLES)/qt-surge-suite/surge-2-16-B-QDM2.pcm
 fate-qdm2: FUZZ = 2
 
-FATE_SAMPLES_AVCONV += fate-qt-alaw-mono
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, PCM_ALAW) += fate-qt-alaw-mono
 fate-qt-alaw-mono: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-1-16-B-alaw.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-alaw-stereo
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, PCM_ALAW) += fate-qt-alaw-stereo
 fate-qt-alaw-stereo: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-2-16-B-alaw.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-ima4-mono
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, ADPCM_IMA_QT) += fate-qt-ima4-mono
 fate-qt-ima4-mono: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-1-16-B-ima4.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-ima4-stereo
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, ADPCM_IMA_QT) += fate-qt-ima4-stereo
 fate-qt-ima4-stereo: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-2-16-B-ima4.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-mac3-mono
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, MACE3) += fate-qt-mac3-mono
 fate-qt-mac3-mono: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-1-8-MAC3.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-mac3-stereo
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, MACE3) += fate-qt-mac3-stereo
 fate-qt-mac3-stereo: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-2-8-MAC3.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-mac6-mono
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, MACE6) += fate-qt-mac6-mono
 fate-qt-mac6-mono: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-1-8-MAC6.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-mac6-stereo
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, MACE6) += fate-qt-mac6-stereo
 fate-qt-mac6-stereo: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-2-8-MAC6.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-ulaw-mono
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, PCM_MULAW) += fate-qt-ulaw-mono
 fate-qt-ulaw-mono: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-1-16-B-ulaw.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-qt-ulaw-stereo
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, PCM_MULAW) += fate-qt-ulaw-stereo
 fate-qt-ulaw-stereo: CMD = md5 -i $(SAMPLES)/qt-surge-suite/surge-2-16-B-ulaw.mov -f s16le
 
-FATE_SAMPLES_AVCONV += fate-quickdraw
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, QDRAW) += fate-quickdraw
 fate-quickdraw: CMD = framecrc -i $(SAMPLES)/quickdraw/Airplane.mov -pix_fmt rgb24
 
-FATE_SAMPLES_AVCONV += fate-rpza
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, RPZA) += fate-rpza
 fate-rpza: CMD = framecrc -i $(SAMPLES)/rpza/rpza2.mov -t 2 -pix_fmt rgb24
 
-FATE_SAMPLES_AVCONV += fate-svq1
+FATE_SAMPLES_AVCONV-$(call DEMDEC, MOV, SVQ1) += fate-svq1
 fate-svq1: CMD = framecrc -i $(SAMPLES)/svq1/marymary-shackles.mov -an -t 10
 
-FATE_SAMPLES_AVCONV += fate-svq3
+FATE_SAMPLES_AVCONV-$(call ALLYES, MOV_DEMUXER SVQ3_DECODER ZLIB) += fate-svq3
 fate-svq3: CMD = framecrc -i $(SAMPLES)/svq3/Vertical400kbit.sorenson3.mov -t 6 -an