Adapt to `unsafeCoerce#` no longer being exported from `GHC.{Base,Prim}`
Commit ghc@74ad75e8
moved unsafeCoerce# from GHC.Prim to Unsafe.Coerce, making it
no longer possible to import unsafeCoerce# from GHC.Prim (or
GHC.Base, which reexported it). Sadly, a large number of Hackage
libraries obtain unsafeCoerce# by importing these modules instead
of GHC.Exts. As a result, all of these libraries need to be patched
to import unsafeCoerce# from somewhere else instead.
Edited by Ryan Scott