oauth: Explicitly depend on -pthread
Followup to
4e1e41733 and
52ecd05ae. oauth-utils.c uses
pthread_sigmask(), requiring -pthread on Debian bullseye at minimum.
Reported-by: Christoph Berg <myon@debian.org>
Tested-by: Christoph Berg <myon@debian.org>
Discussion: https://postgr.es/m/aK4PZgC0wuwQ5xSK%40msg.df7cb.de
Backpatch-through: 18