"Positive/negative" graph meter style #4780

Job	Run time
build-dragonflybsd-latest-gcc	2m 23s
build-freebsd-latest-clang	1m 59s
build-macos-latest-clang	53s
build-ubuntu-latest-clang-analyzer	1m 25s
build-ubuntu-latest-full-featured-clang	1m 13s
build-ubuntu-latest-clang-sanitizer	1m 10s
build-ubuntu-latest-full-featured-gcc	49s
build-ubuntu-latest-gcc-static	50s
build-ubuntu-latest-minimal-clang	1m 6s
build-ubuntu-latest-minimal-gcc	37s
build-ubuntu-latest-pcp	25s
build-netbsd-latest-gcc	2m 46s
build-openbsd-latest-clang	2m 18s
build-solaris-latest-gcc	3m 48s
lint-pcp-config	3s
lint-whitespace	4s
	21m 49s

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