The atom names are like FOURCC, but they are not fourcc

This reverts commit 6e54f3fd.

Conflicts:

	src/win32/thread.c

Trailing spaces, guid names consistency with MMS module, calloc, enum

Pointed-out-by: Michael A. Puls II

also simplify arm neon preprocessor checks

1tbs
remove hungarian prefixes

Audio buffers are destroyed downstream of the decoder, so this
function could never be used. In practice, the audio filters, the
audio output (or the encoder) already use block_Release() to delete
buffers allocated with decoder_NewAudioBuffer().

If "direct rendering" is ever implemented in audio output,
block_Release() custom buffer deletion can be used.

Close #4926

This is the last version that doesn't require p11-kit

Used for track title by iTunes/QT