Two-channel graph (Graph2) meter style #5362

Job	Run time
build-ubuntu-latest-minimal-clang	3m 20s
build-ubuntu-latest-minimal-gcc	44s
build-macos-latest-clang	1m 21s
build-openbsd-latest-clang	2m 50s
build-ubuntu-latest-full-featured-gcc	1m 2s
build-dragonflybsd-latest-gcc	2m 30s
build-ubuntu-latest-full-featured-clang	2m 44s
build-ubuntu-latest-gcc-static	1m 9s
build-ubuntu-latest-pcp	33s
build-ubuntu-latest-clang-analyzer	2m 57s
build-netbsd-latest-gcc	2m 47s
build-ubuntu-latest-clang-sanitizer	2m 42s
build-freebsd-latest-clang	2m 1s
build-unsupported-latest-gcc	32s
build-solaris-latest-gcc	4m 20s
lint-whitespace	3s
lint-pcp-config	3s
	31m 38s

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