Add -haddock to perf.mk rather than prepare-system.sh
To cover ci conditions from ghc8.6 to 8.9, I add -haddock option
to mk/flavours/perf.mk rather than .circleci/prepare-system.sh.
Because in windows condition of ghc-8.9, mk/flavours/* is included
In addition, in linux condition of ghc-8.6, mk/flavors/perf.mk is used.
(cherry picked from commit 43a39c3c2195d5b4400efc845a54f153184b1d7f)