fate: Update AAC ELD 5.1 ref for recent bugfixes.

tests/fate/aac.mak

@@ -56,7 +56,7 @@ fate-aac-ap05_48: REF = $(SAMPLES)/aac/ap05_48.s16
 
 FATE_AAC += fate-aac-er_ad6000np_44_ep0
 fate-aac-er_ad6000np_44_ep0: CMD = pcm -i $(TARGET_SAMPLES)/aac/er_ad6000np_44_ep0.mp4
-fate-aac-er_ad6000np_44_ep0: REF = $(SAMPLES)/aac/er_ad6000np_44_ep0.s16
+fate-aac-er_ad6000np_44_ep0: REF = $(SAMPLES)/aac/er_ad6000np_44.s16
 
 FATE_AAC += fate-aac-er_eld1001np_44_ep0
 fate-aac-er_eld1001np_44_ep0: CMD = pcm -i $(TARGET_SAMPLES)/aac/er_eld1001np_44_ep0.mp4