patch applied (ghc-6.8/ghc): MERGED: GHCi debugger: new flag -fbreak-on-error

[Ian Lynagh]

Wed Sep 12 07:14:27 PDT 2007  Ian Lynagh <igloo at earth.li>
  * MERGED: GHCi debugger: new flag -fbreak-on-error
  Pepe Iborra <mnislaih at gmail.com>**20070911101443
  
       This flag works like -fbreak-on-exception, but only stops
       on uncaught exceptions.

    M ./compiler/main/DynFlags.hs +2
    M ./compiler/main/InteractiveEval.hs -8 +19