Maybe I'm just falling in between several updates making up a feature,
but from today's sources, where mips is being replaced mipsel and
mipseb, I experienced build problems in sys/lib/libkern and lib/csu, where
files that currently live in a directory mips are sought in mipsel
on my pmax.

Is the intention to bend the build tools to reach back to .../mips
or to split/copy .../mips into .../mipsel and .../mipseb directories?

- Erik