svt-av1 3.1.2-2

[Takashi Yano]

The following packages have been uploaded to the Cygwin distribution:

* svt-av1-3.1.2-2
* libsvtav1enc3-3.1.2-2
* libsvtav1-devel-3.1.2-2
* libsvtav1-doc-3.1.2-2

The Scalable Video Technology for AV1 (SVT-AV1 Encoder) is an AV1-compliant software encoder library. The work on the SVT-AV1 encoder targets the development of a production-quality AV1-encoder with performance levels applicable to a wide range of applications, from premium VOD to real-time and live encoding/transcoding.

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- Disable LTO to avoid generating broken implib