CI: add s390x and ppc64le jobs #29

Job	Run time
arm (arm32v7)	13m 12s
freebsd (self-hosted, FreeBSD, X64, 9.4.8)	14m 43s
arm (arm64v8)	9m 20s
build (ubuntu-latest, 8.6, 3.8.1.0)	10m 3s
freebsd (self-hosted, FreeBSD, X64, 9.6.4)	6m 12s
darwin_arm (self-hosted, macOS, ARM64, 8.10.7)	26m 48s
build (ubuntu-latest, 8.8, 3.8.1.0)	10m 10s
darwin_arm (self-hosted, macOS, ARM64, 9.2.8)	34m 16s
i386	9m 33s
build (ubuntu-latest, 8.10, 3.8.1.0)	10m 47s
darwin_arm (self-hosted, macOS, ARM64, 9.4.7)	22m 49s
build (ubuntu-latest, 9.0, 3.8.1.0)	11m 10s
build (ubuntu-latest, 9.2, 3.8.1.0)	8m 36s
build (ubuntu-latest, 9.4, 3.8.1.0)	10m 53s
build (ubuntu-latest, 9.6, 3.8.1.0)	8m 58s
build (ubuntu-latest, 9.8, 3.8.1.0)	9m 19s
build (macOS-12, 9.4, 3.8.1.0)	1h 10m 40s
build (macOS-12, 9.6, 3.8.1.0)	36m 57s
build (windows-latest, 9.4, 3.8.1.0)	53m 15s
build (windows-latest, 9.6, 3.8.1.0)	48m 25s
emulated (s390x)	1m 37s
emulated (ppc64le)	1m 47s
	7h 9m 30s

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