build

feat: add docker image and sysroot for s390x (#24) #109

Job	Run time
linux (alpine-arm64)	35s
linux (alpine-x64)	18s
linux (bionic-devtoolset-arm32v7)	1m 4s
linux (focal-arm64)	1m 49s
linux (focal-armhf)	1m 50s
linux (focal-ppc64le)	1m 12s
linux (focal-riscv64)	1m 34s
linux (focal-x64)	3m 14s
linux (focal-devtoolset-ppc64le)	1m 8s
linux (focal-devtoolset-riscv64)	1m 13s
linux (trixie-devtoolset-loong64)	4m 10s
linux (focal-devtoolset-s390x)	1m 32s
	19m 39s

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