patch applied (ghc): Rename Opt_FFI to Opt_ForeignFunctionInterface to match the language name

[Ian Lynagh]

Sat Aug  4 08:42:34 PDT 2007  Ian Lynagh <igloo at earth.li>
  * Rename Opt_FFI to Opt_ForeignFunctionInterface to match the language name

    M ./compiler/main/DynFlags.hs -5 +5
    M ./compiler/parser/Lexer.x -1 +1