patch applied (ghc): Added parser and abstract syntax support for stand-alone deriving declarations.

[bjorn at bringert.net]

Sat Sep 16 17:09:56 PDT 2006  bjorn at bringert.net
  * Added parser and abstract syntax support for stand-alone deriving declarations.

    M ./compiler/hsSyn/HsDecls.lhs -1 +20
    M ./compiler/parser/Lexer.x -1 +1
    M! ./compiler/parser/Parser.y.pp -3 +2
    M ./compiler/parser/RdrHsSyn.lhs -1 +12