gnu: Add ghc-quickcheck-instances.

* gnu/packages/haskell.scm (ghc-quickcheck-instances): New variable.

gnu: Add ghc-unix-compat.

* gnu/packages/haskell.scm (ghc-unix-compat): New variable.

gnu: Add ghc-unix-time.

* gnu/packages/haskell.scm (ghc-unix-time): New variable.

gnu: Add ghc-iproute.

* gnu/packages/haskell.scm (ghc-iproute): New variable.

gnu: Add ghc-unbounded-delays.

* gnu/packages/haskell.scm (ghc-unbounded-delays): New variable.

gnu: Add ghc-tagged.

* gnu/packages/haskell.scm (ghc-tagged): New variable.

gnu: Add ghc-auto-update.

* gnu/packages/haskell.scm (ghc-auto-update): New variable.

gnu: Add ghc-doctest.

* gnu/packages/haskell.scm (ghc-doctest): New variable.

gnu: Add ghc-blaze-html.

* gnu/packages/haskell.scm (ghc-blaze-html): New variable.

gnu: Add ghc-blaze-markup.

* gnu/packages/haskell.scm (ghc-blaze-markup): New variable.

gnu: Add ghc-blaze-builder.

* gnu/packages/haskell.scm (ghc-blaze-builder): New variable.

gnu: Add ghc-base-compat.

* gnu/packages/haskell.scm (ghc-base-compat): New variable.

gnu: Add ghc-easy-file.

* gnu/packages/haskell.scm (ghc-easy-file): New variable.

gnu: Add ghc-byteorder.

* gnu/packages/haskell.scm (ghc-byteorder): New variable.

gnu: Add ghc-monad-control.

* gnu/packages/haskell.scm (ghc-monad-control): New variable.

gnu: Add ghc-transformers-base.

* gnu/packages/haskell.scm (ghc-transformers-base): New variable.

gnu: Add ghc-mmorph.

* gnu/packages/haskell.scm (ghc-mmorph): New variable.

gnu: Add ghc-vault.

* gnu/packages/haskell.scm (ghc-vault): New variable.

gnu: Add ghc-base-orphans.

* gnu/packages/haskell.scm (ghc-base-orphans): New variable.

gnu: Add ghc-optparse-applicative.

* gnu/packages/haskell.scm (ghc-optparse-applicative): New variable.