build

Default to `chroma=444`/`matrix_coefficients=0` in lossless mode #1521

Job	Run time
build (nothing)	29s
build (tarball, 1, 1, 1, 1, 1)	50s
build (graphics, 1)	38s
build (x265, 1)	40s
build (x265 / graphics, 1, 1)	41s
build (libde265 (1) / graphics, 1, 1)	41s
build (libde265 (2) / graphics, 1, 2)	1m 58s
build (libde265 (1) / x265 / graphics, 1, 1, 1)	1m 6s
build (libde265 (2) / x265 / graphics, 1, 1, 2)	2m 10s
build (libde265 (1) / x265 / aom / graphics, 1, 1, 1, 1)	49s
build (libde265 (1) / x265 / dav1d / graphics, 1, 1, 1, 1)	1m 42s
build (libde265 (1) / x265 / aom / rav1e / graphics, 1, 1, 1, 1, 1)	11m 16s
	23m 0s

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