fate-twinvq: add dependencies

Signed-off-by: Mans Rullgard <mans@mansr.com>

tests/fate/vqf.mak

-FATE_SAMPLES_AVCONV += fate-twinvq
+FATE_SAMPLES_AVCONV-$(call DEMDEC, VQF, TWINVQ) += fate-twinvq
 fate-twinvq: CMD = pcm -i $(SAMPLES)/vqf/achterba.vqf
 fate-twinvq: CMP = oneoff
 fate-twinvq: REF = $(SAMPLES)/vqf/achterba.pcm
 
-FATE_SAMPLES_AVCONV += fate-vqf-demux
+FATE_SAMPLES_AVCONV-$(CONFIG_VQF_DEMUXER) += fate-vqf-demux
 fate-vqf-demux: CMD = md5 -i $(SAMPLES)/vqf/achterba.vqf -acodec copy -f framecrc