- Add update-matrix3.cpp.patch in order
to fix boo#1158372.

- Switch to git checkout (GitHub tarbals lack required submodules)
- Build unit tests separately as they impact the build result and
produce a broken install rule
- Update to version 2.9.2:
* colorspace: fix crash on invalid conversion from unspec to
real primaries
* x86: additional optimizations for AMD Piledriver
* x86: optimizations for AMD Zen2 processors

- Update to version 2.9.1:
* resize: fix incorrect spline36 coefficients (introduced in 2.9)

- Update to version 2.9:
* colorspace: improve accuracy of SSE2 LUT-based transfer
functions
* depth: AVX2 and AVX-512 code paths for limited range upsampling
* graph: optimize tile width calculation
* graph: reduce execution overhead
* graph: skip processing pixels outside of active window
* resize: change default bicubic from Mitchell-Netravali to
Catmull-Rom
* resize: make output bit-exact regardless of active window
dimensions
* x86: optimizations for AMD Piledriver and Zen1 processors

- Update to version 2.8:
* api: rename colorspace enum values