re: port-macppc/43011: macppc64 prebuild cleanup fails in macppc/stand/ofwboot if macppc build done before

[matthew green <mrg%eterna.com.au@localhost>]

this one is a common problem across any platform that supports multiple
MACHINE_ARCH's as the default.  you can see it on evb* if you try to build
le and be at the same time.

the workaround is to point your OBJDIR somewhere else manually.  i haven't
yet figured out a way to do this, but i'm probably going to replace my
simple environment of:

        MAKEOBJDIRPREFIX='/varo/bj/${MACHINE}'

with an expression on that adds $MACHINE_ARCH there for certain $MACHINE's.


.mrg.