flac: Update 1.3.4 to 1.4.0

flac: Update 1.3.4 to 1.4.0

This is a major update with some breaking library changes. Full release
notes are available at: https://xiph.org/flac/changelog.html

As part of this update, make some changes to the recipe:
* Development has moved from sourceforge to github, update BUGTRACKER
  link.
* Move ogg support to a PACKAGECONFIG option rather than force enabled.
  Keep it enabled by default to retain previous behavior.
* Move altivec, vsx, and sse flags to PACKAGECONFIG as well to make them
  easier to toggle. Add new avx flag which enables runtime detection of
  AVX/AVX2 instructions.
* Remove liboggflac and liboggflac++ packaging. This was merged into the
  main libflac and libflac++ libraries in version 1.1.3, so these
  packages have been empty.

License-Update: Updated copyright years

Signed-off-by: Robert Joslyn <robert.joslyn@redrectangle.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>