fate: enable fate-mapchan-6ch-extract-2-downmix-mono

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

tests/fate/mapchan.mak

@@ -2,9 +2,9 @@ FATE_MAPCHAN += fate-mapchan-6ch-extract-2
 fate-mapchan-6ch-extract-2: tests/data/asynth-22050-6.wav
 fate-mapchan-6ch-extract-2: CMD = ffmpeg -i $(TARGET_PATH)/tests/data/asynth-22050-6.wav -map_channel 0.0.0 -f wav md5: -map_channel 0.0.1 -f wav md5:
 
-#FATE_MAPCHAN += fate-mapchan-6ch-extract-2-downmix-mono
-#fate-mapchan-6ch-extract-2-downmix-mono: tests/data/asynth-22050-6.wav
-#fate-mapchan-6ch-extract-2-downmix-mono: CMD = md5 -i $(TARGET_PATH)/tests/data/asynth-22050-6.wav -map_channel 0.0.1 -map_channel 0.0.0 -ac 1 -f wav
+FATE_MAPCHAN += fate-mapchan-6ch-extract-2-downmix-mono
+fate-mapchan-6ch-extract-2-downmix-mono: tests/data/asynth-22050-6.wav
+fate-mapchan-6ch-extract-2-downmix-mono: CMD = md5 -i $(TARGET_PATH)/tests/data/asynth-22050-6.wav -map_channel 0.0.1 -map_channel 0.0.0 -ac 1 -f wav
 
 FATE_MAPCHAN += fate-mapchan-silent-mono
 fate-mapchan-silent-mono: tests/data/asynth-22050-1.wav