openbsd, plpython, missing threading symbols

Did we recently make some fixes for FBSD that cured the problem with 
unresolved pthread* symbols for plpython? If so, should we look at 
possibly doing something similar for OpenBSD? That might clean up 
buildfarm member spoonbill which has been failing ever since we started 
testing PLs. Stefan has upgraded the buildfarm code on this machine so 
we can now see all the logs from tha various buildfarm stages, if that 
is any help.

cheers

andrew