[opus] Opus 1.2-rc1 released

[Jean-Marc Valin]

Hi everyone,

I'd like to announce the release of Opus 1.2-rc1. It is the first
release candidate of the upcoming Opus 1.2 release. If no issues are
found with it, it will soon become 1.2-final, so we encourage everyone
to give it a try. Changes compared to 1.2-beta include:
* Improved quality on files with powerful tones that cause MDCT leakage
* Improved bit allocation on mode transitions (CELT to/from SILK/hybrid)
* More ARM Neon optimizations
* Fixes to the speech/music detection at the very beginning of files
* Fixes to the unit tests (fixes illegal instructions and –disable-static)

You can get it from the download page:
https://www.opus-codec.org/downloads/

Please try it and report any issues you find.

Cheers,

	Jean-Marc