Rework humanTimeUnit() formats of meters #1440

Job	Run time
build-ubuntu-latest-minimal-gcc	36s
build-ubuntu-latest-full-featured-clang	1m 5s
build-macos-latest-clang	39s
build-freebsd-latest-clang	2m 49s
build-netbsd-latest-gcc	2m 59s
build-dragonflybsd-latest-gcc	2m 15s
build-openbsd-latest-clang	2m 13s
build-solaris-latest-gcc	3m 51s
build-ubuntu-latest-clang-sanitizer	1m 1s
build-ubuntu-latest-full-featured-gcc	53s
build-ubuntu-latest-gcc-static	56s
build-ubuntu-latest-minimal-clang	1m 7s
build-ubuntu-latest-clang-analyzer	1m 18s
build-ubuntu-latest-pcp	46s
lint-pcp-config	5s
lint-whitespace	4s
	22m 37s

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