* new analysis code and tuning that significantly improves encoding
quality, especially for variable-bitrate (VBR),
* automatic detection of speech or music to decide which encoding
mode to use,
* surround with good quality at 128 kbps for 5.1 and usable down
to 48 kbps,
* and speed improvements on all architectures.
Chase shared library bump.
PR: 184956
Fix build of gstreamer and gstreamer1 with glib 2.38.x [1].
Update gstreamer and gstreamer-plugins to new rules, USES=gmake pathfix,
new LIB_DEPENDS syntax.
Only pull in flex if base version is too old.
Be more selective for which OSVERSIONS we need gcc due to the clang bug.
Obtained from: Gstreamer upstream [1]
* new surround API
* fixes for a few minor glitches during mode switching
* fixes a regression in the FEC code introduced in 1.0.2
Chase libopus bump in dependent ports.
