Four packages missing from ghc-doc Provides line, 7.8.20140710-1

[David Fox]

I believe that these packages should be in the Provides line for the
ghc-doc package:

libghc-binary-doc
libghc-haskeline-doc
libghc-terminfo-doc
libghc-xhtml-doc

ghc-doc contains a .haddock file for each of them.