Sigh, I broke crake again

I just committed some regression test cleanup that removed or renamed
a couple of C-language functions in regress.so. I see that crake is
now failing XversionUpgrade tests, and although I can't see the details,
I bet the problem is from trying to load CREATE FUNCTION commands from
the old regression databases that now don't point to an existing C
function.

Does it seem practical to adjust TestUpgradeXversion.pm to cope with
this change? An alternative answer is to put back C-language stubs
in regress.c for the removed functions, but that seems a bit grotty.

regards, tom lane