Add .NOTPARALLEL to contrib/Makefile - Mailing list pgsql-hackers

Hi,

Currently running "make -j16 all check" in contrib/ results in a mess because
all pg_regress invocations fight over the same port. Adding a simple
.NOTPARALLEL: check-%-recurse
into contrib/Makefile fixes that. Do we want that?

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services