canoeboot/cbmk: canoeboot build system. https://canoeboot.org/ @ v0.1

Leah Rowe f9590760e8 support making u-boot-only tarballs in releases		9 月之前
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build	ce9030b74f Canoeboot v0.1	9 月之前
update	f9590760e8 support making u-boot-only tarballs in releases	9 月之前