meson + libpq_pipeline

I just realized while looking at Jelte's patch for the new nonblocking
query cancel stuff that the Meson build doesn't run the libpq_pipeline
tests :-(

Is there any way to wire the tests to make it work?

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/
"I can't go to a restaurant and order food because I keep looking at the
fonts on the menu.  Five minutes later I realize that it's also talking
about food" (Donald Knuth)