i386 and epiphany on FreeBSD 13 for rtems 5

[Joel Sherrill]

Hi

Both i386 and epiphany rtems 5 GCC fail to build on FreeBSD 13. It
appears that the newer compiler on FreeBSD 13 does not like some code
from the older GCC.

Logs linked here:

epiphany - https://lists.rtems.org/pipermail/build/2021-December/030627.html

i386 - https://lists.rtems.org/pipermail/build/2021-December/030628.html

I only see two fixes. (1) Add --disable-werror to these targets on
rtems5 or (2) update the gcc on rtems5. We always are resistant to (2)
so I guess that leaves us with option (1).

Thoughts, comments, jokes, concurrence?

--joel