[coreboot] Build tutorials in the wiki

[Carl-Daniel Hailfinger]

Hi,

I noticed that we have lots of pages in the wiki called "xyz Build
Tutorial", but most of them are only incomplete status pages and don't
even mention which target to use. I'm proposing a mass rename of these
pages to "yxz Status" to reflect their contents more accurately. Pages
which contain real build intructions will of course keep their name.

Regards,
Carl-Daniel