[arch-haskell] Updated cabal2arch

[Don Stewart]

I updated cabal2arch to match the "implicit package" list provided by
our GHC 6.10 package, based on :

    http://haskell.org/haskellwiki/Libraries_released_with_GHC

Note the following have gone away:

    ALUT
    arrows
    cgi
    fgl
    GLUT
    HGL
    OpenAL
    OpenGL
    readline

So they'll now have to be pulled from their standalone packages.

The following are new:

    editline
    integer
    extensible-exceptions
    ghc-prim