haskell-accelerate: disable haddock phase to avoid build error

    Running Haddock for accelerate-0.13.0.0...
    Warning: The documentation for the following packages are not installed. No
    links will be generated to these packages: rts-1.0
    Preprocessing library accelerate-0.13.0.0...
    Setup: dist/doc/html/accelerate/haddock-prolog16263.txt: invalid argument