ext/faad/gstfaad.c: Fix #334748: use fake_codec_data if the first bytes of the first...

ext/faad/gstfaad.c: Fix #334748: use fake_codec_data if the first bytes of the first buffer we process doesn't look l...

Original commit message from CVS:
* ext/faad/gstfaad.c: (gst_faad_setcaps),
(looks_like_valid_header), (gst_faad_chain):
Fix #334748: use fake_codec_data if the first bytes of the first
buffer we process doesn't look like plausible AAC data (e.g.
reserved values for rate, or channels). Fixes playback of Apple's
movie trailers.