qtdemux: Add support for FLAC encapsulated in ISOBMFF

As defined by
https://git.xiph.org/?p=flac.git;a=blob_plain;f=doc/isoflac.txt

https://bugzilla.gnome.org/show_bug.cgi?id=773712
diff --git a/gst/isomp4/qtdemux_types.c b/gst/isomp4/qtdemux_types.c
index 693ad5d..8ce37ce 100644
--- a/gst/isomp4/qtdemux_types.c
+++ b/gst/isomp4/qtdemux_types.c
@@ -89,6 +89,8 @@
   {FOURCC_fiel, "fiel", 0,},
   {FOURCC_jp2x, "jp2x", 0,},
   {FOURCC_alac, "alac", 0,},
+  {FOURCC_fLaC, "fLaC", 0, qtdemux_dump_fLaC},
+  {FOURCC_dfLa, "dfLa", 0, qtdemux_dump_dfLa},
   {FOURCC_wave, "wave", QT_FLAG_CONTAINER},
   {FOURCC_appl, "appl", QT_FLAG_CONTAINER},
   {FOURCC_esds, "esds", 0},