Merge commit 'a7985cfd'

* commit 'a7985cfd':
  audio_fifo: Split into a separate doxygen module

Conflicts:
	libavutil/audio_fifo.h

See: 689e0280Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/audio_fifo.h

@@ -35,7 +35,7 @@
  * @addtogroup lavu_audio
  * @{
  *
- * @defgroup lavu_audiofifo Audio First-In-First-Out Buffer
+ * @defgroup lavu_audiofifo Audio FIFO Buffer
  * @{
  */