Add support for flac >= 1.1.3 which changed the API. Fixes bug #385887.

Add support for flac >= 1.1.3 which changed the API. Fixes bug #385887.

Original commit message from CVS:
Patch by: Josh Coalson <xflac at yahoo dot com>,
updated by Alexis Ballier <aballier at gentoo dot org>:
* configure.ac:
* ext/flac/gstflacdec.c: (gst_flac_dec_reset_decoders),
(gst_flac_dec_setup_seekable_decoder),
(gst_flac_dec_setup_stream_decoder), (gst_flac_dec_seek),
(gst_flac_dec_tell), (gst_flac_dec_length), (gst_flac_dec_eof),
(gst_flac_dec_read_seekable), (gst_flac_dec_read_stream):
* ext/flac/gstflacdec.h:
* ext/flac/gstflacenc.c: (gst_flac_enc_init),
(gst_flac_enc_finalize), (gst_flac_enc_set_metadata),
(gst_flac_enc_sink_setcaps), (gst_flac_enc_update_quality),
(gst_flac_enc_seek_callback), (gst_flac_enc_write_callback),
(gst_flac_enc_tell_callback), (gst_flac_enc_sink_event),
(gst_flac_enc_chain), (gst_flac_enc_set_property),
(gst_flac_enc_get_property), (gst_flac_enc_change_state):
* ext/flac/gstflacenc.h:
Add support for flac >= 1.1.3 which changed the API. Fixes bug #385887.