patch applied (packages/base): in the show instance for Exception, print the type of dynamic exceptions

[Simon Marlow]

Thu Apr  6 04:24:44 PDT 2006  Simon Marlow <simonmar at microsoft.com>
  * in the show instance for Exception, print the type of dynamic exceptions
  Unfortunately this requires some recursve module hackery to get at 
  the show instance for Typeable.

    M ./Data/Dynamic.hs-boot +2
    A ./Data/Typeable.hs-boot
    A ./GHC/Dynamic.hs
    A ./GHC/Dynamic.hs-boot
    M ./GHC/IOBase.lhs -2 +2