RFC: "Crochet" build tool

[Adrian Chadd]

NanoBSD isn't specifically x86 only.

The startup script stuff is x86 only.

The build/installworld part of nanobsd can be refactored out and made
platform portable.

The UFS image building part can be refactored out and made platform portable.

The startup script stuff can be refactored out and made platform portable.

The disk image stuff can be refactored out and made platform portable.

These aren't unsolvable problems. :-)



Adrian