Add State monad benchmarks by Andras Kovacs

Summary:
They are originally from
https://github.com/AndrasKovacs/misc-stuff/blob/master/haskell/Eff/EffBench.hs

They show interesting interactions with call arity, spec constr and SAT.

Reviewers: O26 nofib, michalt, simonpj, bgamari

Reviewed By: bgamari

Subscribers: RyanGlScott

GHC Trac Issues: #13892

Differential Revision: https://phabricator.haskell.org/D3683