[commit: ghc-prim] fix#5464's head updated: Merge branch 'fix#5464' of /home/staff/magal101/repos/ghc/libraries/ghc-prim into fix#5464 (418a919)

[José Pedro Magalhães]

Repository : ssh://darcs.haskell.org//srv/darcs/packages/ghc-prim

Branch 'fix#5464' now includes:

     c7623fc... Add a data type we can use to box up equality evidence for -XConstraintKind
     990b296... Break the GHC.Generics / GHC.Types import loop.
     418a919... Merge branch 'fix#5464' of /home/staff/magal101/repos/ghc/libraries/ghc-prim into fix#5464