logging code cleanup #248

Job	Run time
build_and_test (12, amd64.amd64.max.-mssse3 -mavx -mvzeroupper)	3m 9s
build_and_test (12, s390x.s390x.max)	19m 20s
build_and_test (12, arm64.arm64v8.cortex-a53.-march=armv8-a+simd)	17m 49s
build_and_test (13, armhf.arm32v7.max.-march=armv7-a+simd)	21m 44s
build_and_test (12, mips64le.mips64le.MIPS64R2-generic)	20m 46s
build_and_test (11, amd64.amd64.max.-mssse3 -mavx -mvzeroupper)	3m 7s
build_and_test (12, ppc64le.ppc64le.power8)	19m 49s
build_and_test (11, armhf.arm32v7.max.-march=armv7-a+simd)	18m 23s
build_and_test (12, armhf.arm32v7.max.-march=armv7-a+simd)	18m 41s
build_and_test (13, amd64.amd64.max.-mssse3 -mavx -mvzeroupper)	3m 13s
build_and_test (11, arm64.arm64v8.cortex-a53.-march=armv8-a+simd)	17m 2s
build_and_test (13, s390x.s390x.max)	19m 26s
build_and_test (13, arm64.arm64v8.cortex-a53.-march=armv8-a+simd)	19m 1s
build_and_test (13, ppc64le.ppc64le.power8)	22m 21s
build_and_test (13, riscv64.riscv64.rv64)	21m 20s
	4h 5m 11s

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