Bump nofib submodule
Bump nofib submodule

Test Plan: run nofib

Reviewers: bgamari, tdammers

Reviewed By: tdammers

Subscribers: rwbarton, carter

Differential Revision: https://phabricator.haskell.org/D5396

sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc,sdiehl/ghc