CI: add s390x and ppc64le jobs #31

Job	Run time
arm (arm32v7)	10m 27s
darwin_arm (self-hosted, macOS, ARM64, 8.10.7)	6h 0m 18s
darwin_arm (self-hosted, macOS, ARM64, 9.2.8)	6h 0m 17s
emulated (s390x)	1m 10s
arm (arm64v8)	9m 3s
emulated (ppc64le)	1m 16s
darwin_arm (self-hosted, macOS, ARM64, 9.4.7)	25m 8s
build (ubuntu-latest, 8.6, 3.8.1.0)	9m 44s
build (ubuntu-latest, 8.8, 3.8.1.0)	27m 56s
build (ubuntu-latest, 8.10, 3.8.1.0)	28m 16s
i386	10m 20s
build (ubuntu-latest, 9.0, 3.8.1.0)	18m 35s
freebsd (self-hosted, FreeBSD, X64, 9.4.8)	8m 3s
build (ubuntu-latest, 9.2, 3.8.1.0)	8m 29s
freebsd (self-hosted, FreeBSD, X64, 9.6.4)	6h 0m 9s
build (ubuntu-latest, 9.4, 3.8.1.0)	9m 37s
build (ubuntu-latest, 9.6, 3.8.1.0)	10m 17s
build (ubuntu-latest, 9.8, 3.8.1.0)	9m 46s
build (macOS-12, 9.4, 3.8.1.0)	51m 29s
build (macOS-12, 9.6, 3.8.1.0)	1h 16m 10s
build (windows-latest, 9.4, 3.8.1.0)	49m 26s
build (windows-latest, 9.6, 3.8.1.0)	49m 37s
	1d 0h 55m 33s

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