build

examples: add zlib dependency #1355

Job	Run time
build (nothing)	53s
build (tarball, 1, 1, 1, 1, 1)	1m 5s
build (graphics, 1)	47s
build (x265, 1)	1m 1s
build (x265 / graphics, 1, 1)	57s
build (libde265 (1) / graphics, 1, 1)	1m 29s
build (libde265 (2) / graphics, 1, 2)	3m 0s
build (libde265 (1) / x265 / graphics, 1, 1, 1)	1m 10s
build (libde265 (2) / x265 / graphics, 1, 1, 2)	3m 21s
build (libde265 (1) / x265 / aom / graphics, 1, 1, 1, 1)	1m 13s
build (libde265 (1) / x265 / dav1d / graphics, 1, 1, 1, 1)	2m 36s
build (libde265 (1) / x265 / aom / rav1e / graphics, 1, 1, 1, 1, 1)	20m 28s
	38m 0s

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