olpc-dev-kernel and yum update

[John Watlington]

This isn't a bug report, just an observation to keep anyone else from
spending time on this known condition (cjb's comment was "of course!"):

If you want to update a kernel on a 13.1.0/13.2.0 build, you must first
run olpc-dev-kernel.   Running it after doing the yum update kernel
will result in a confused system, which cannot be fixed using yum alone.

Cheers,
wad