Teach '-m' option of bsdlabel(8) to sunlabel(8)

[Makoto Matsushita]

I'd like to try to bulid FreeBSD/sparc64 on i386 box, but due to the
lack of bsdlabel(8)'s '-m' option (set machine archtecture) on
sunlabel(8), newfs(8) cannot work.

Question: Anybody working on teaching '-m' option to sunlabel(8)?

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Makoto `MAR' Matsushita