fate: Add a test for AAC ELD480.

The source is er_eld_2100np_48_ep0.mp4 from the official test set.

tests/fate/aac.mak

@@ -66,6 +66,10 @@ FATE_AAC += fate-aac-er_eld2000np_48_ep0
 fate-aac-er_eld2000np_48_ep0: CMD = pcm -i $(TARGET_SAMPLES)/aac/er_eld2000np_48_ep0.mp4
 fate-aac-er_eld2000np_48_ep0: REF = $(SAMPLES)/aac/er_eld2000np_48_ep0.s16
 
+FATE_AAC += fate-aac-er_eld2100np_48_ep0
+fate-aac-er_eld2100np_48_ep0: CMD = pcm -i $(TARGET_SAMPLES)/aac/er_eld2100np_48_ep0.mp4
+fate-aac-er_eld2100np_48_ep0: REF = $(SAMPLES)/aac/er_eld2100np_48.s16
+
 
 fate-aac-ct%: CMD = pcm -i $(TARGET_SAMPLES)/aac/CT_DecoderCheck/$(@:fate-aac-ct-%=%)
 fate-aac-ct%: REF = $(SAMPLES)/aac/CT_DecoderCheck/aacPlusv2.wav