current cvs on powerpc

[Ed Sutter]

> In RTEMS-CVS/4.7, adding -D_OLD_EXCEPTIONS_PROCESSING to your CFLAGS
> should do, ... if your BSP is ready to support both kind of exceptions.

Sorry if I'm just making this confusing, but the gen405 bsp builds that
way by default.  I didn't touch anything to cause it to build with the
old-exception-processing model.  Is it possible that the gen405 bsp was
not updated to use the new-exception-processing model?

Ed