Feature: experimental meson buildsystem #1721

Job	Run time
build-linux (ubuntu-20.04, focal, clang-15, 12.2.Rel1)	3m 37s
build-mingw (windows-2022, ucrt64)	2m 42s
build-linux (ubuntu-20.04, focal, gcc-11, 12.2.Rel1)	3m 35s
build-mingw (windows-2022, clang64)	2m 37s
size-diff	48s
build-linux-meson (12.2.Rel1, 96b_carbon)	36s
build-linux-meson (12.2.Rel1, bluepill)	43s
build-linux-meson (12.2.Rel1, f072)	38s
build-linux-meson (12.2.Rel1, f3)	43s
build-linux-meson (12.2.Rel1, f4discovery)	36s
build-linux-meson (12.2.Rel1, hydrabus)	41s
build-linux-meson (12.2.Rel1, launchpad-icdi)	42s
build-linux-meson (12.2.Rel1, native)	43s
build-linux-meson (12.2.Rel1, stlink)	39s
build-linux-meson (12.2.Rel1, stlinkv3)	42s
build-linux-meson (12.2.Rel1, swlink)	40s
	20m 42s

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