The following tests would result in framework failures when using a ghc
build with HADDOCK_DOCS=NO in mk/build.mk or mk/validate.mk:

  * haddock.Cabal
  * haddock.base
  * haddock.compiler

Test Plan: run make in tests/perf/haddock

Differential Revision: https://phabricator.haskell.org/D899

(cherry picked from commit 6694ccf9)