Ben Gamari authored Sep 19, 2017 and Ben Gamari committed Sep 19, 2017

orzo in `#ghc` reported seeing a crash due to the retainer profiler encountering
a BLOCKING_QUEUE closure, which isRetainer didn't know about. I performed an
audit to make sure that all of the valid closure types were listed; they
weren't. This is my guess of how they should appear.

Test Plan: Validate

Reviewers: simonmar, austin, erikd

Reviewed By: simonmar

Subscribers: rwbarton, thomie

GHC Trac Issues: #14235

Differential Revision: https://phabricator.haskell.org/D3967