gnu: Add ghc-cereal.

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

gnu: Add ghc-zip-archive.

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

gnu: Add ghc-css-text.

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

gnu: Add ghc-aeson.

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

gnu: Add ghc-attoparsec.

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

gnu: Add ghc-scientific.

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

gnu: Add ghc-tasty-ant-xml.

* gnu/packages/haskell.scm (ghc-tasty-ant-xml): New variable.

gnu: Add ghc-tasty-smallcheck.

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

gnu: Add ghc-smallcheck.

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

gnu: Add ghc-tasty-golden.

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

gnu: Add ghc-temporary-rc.

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

gnu: Add ghc-clock.

Add ghc-clock, which depends indirectly on ghc-clock-bootstrap for its
test suite.

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

gnu: Add ghc-tasty-quickcheck.

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

gnu: Add ghc-tasty-hunit.

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

gnu: Add ghc-tasty.

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

gnu: Add ghc-clock-bootstrap.

The ghc-clock-bootstrap package has tests disabled, since they
themselves indirectly require ghc-clock.  After adding ghc-tasty and
ghc-tasty-quickcheck, ghc-clock is defined as a public package with
tests enabled.

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

gnu: Add ghc-stringsearch.

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

gnu: Add ghc-word8.

* gnu/packages/haskell.scm (ghc-word8): New variable.

gnu: Add ghc-lifted-base.

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

gnu: Add ghc-regex-tdfa-rc.

* gnu/packages/haskell.scm (ghc-regex-tdfa-rc): New variable.