Update CMakeLists.txt #115

Job	Run time
native ubuntu gcc	2m 24s
debian linux/386	1m 52s
native ubuntu clang	1m 4s
debian linux/amd64	1m 28s
native macos darwin	1m 4s
debian linux/arm/v5	17m 8s
native macos clang	50s
debian linux/arm/v7	11m 25s
native windows gcc	2m 7s
debian linux/arm64/v8	11m 57s
native windows clang-win	1m 39s
debian linux/mips64le	11m 14s
debian linux/ppc64le	9m 6s
debian linux/s390x	11m 47s
debian:experimental linux/riscv64	10m 16s
lpenz/debian-buster-mipsel linux/mipsel	9m 48s
lpenz/debian-buster-mips linux/mips	9m 23s
	1h 54m 32s

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