The files src/flac/encode.c and src/libFLAC/stream_encoder.c use
functions in libFLAC that are marked as 'unpublished debug routines'.
This patch moves these functions to new file include/share/private.h
and marks them as 'unpublished debug routines'.
The autoreconf tool is provided by autoconf to do what custom
autogen.sh scripts in many projects used to do. Only it is more
robust and widely tested. It has been available for several years,
too. No reason to rely on custom code for this.
Signed-off-by: Max Horn <max@quendi.de>