Rework humanTimeUnit() formats of meters #1411

Job	Run time
build-netbsd-latest-gcc	2m 59s
build-freebsd-latest-clang	1m 58s
build-dragonflybsd-latest-gcc	2m 17s
build-macos-latest-clang	45s
build-openbsd-latest-clang	2m 34s
build-solaris-latest-gcc	3m 44s
build-ubuntu-latest-clang-analyzer	1m 21s
build-ubuntu-latest-clang-sanitizer	1m 7s
build-ubuntu-latest-full-featured-clang	1m 14s
build-ubuntu-latest-full-featured-gcc	52s
build-ubuntu-latest-gcc-static	50s
build-ubuntu-latest-minimal-clang	1m 55s
build-ubuntu-latest-minimal-gcc	36s
build-ubuntu-latest-pcp	26s
lint-pcp-config	3s
lint-whitespace	2s
	22m 43s

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