If we expand the variable AUTOREV in OE-Core, it triggers side effects in the
fetcher. The situation isn't ideal and needs improvement but this breaks
and is blocking enabling BB_DEFAULT_EVENTLOG.
Hack around the issue for now so we unblock things until we can work out
a better plan for how to improve AUTOREV support.
(Bitbake rev: cb9b6530f3d12c56a8b48847af2e7461924205d2)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>