Tweak the GHC-8 / binary-0.8 version CPP hackery
Tweak the GHC-8 / binary-0.8 version CPP hackery

Try and pick the right default for ghc-8.

sopvop/cabal,thomie/cabal,mydaum/cabal,bennofs/cabal,headprogrammingczar/cabal,edsko/cabal,Heather/cabal,sopvop/cabal,Heather/cabal,themoritz/cabal,lukexi/cabal,gbaz/cabal,gbaz/cabal,sopvop/cabal,mydaum/cabal,kolmodin/cabal,themoritz/cabal,garetxe/cabal,themoritz/cabal,headprogrammingczar/cabal,lukexi/cabal,bennofs/cabal,edsko/cabal,garetxe/cabal,thomie/cabal,kolmodin/cabal