patch applied (ghc): Update the location of libffi.dll.a

[Ian Lynagh]

Tue Jan 18 08:42:25 PST 2011  Ian Lynagh <igloo at earth.li>
  * Update the location of libffi.dll.a
  As far as I can see this has been wrong for some time, but only bit
  recently.

    M ./libffi/ghc.mk -1 +1

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20110118164225-3fd76-8ca6956ff23bd955845e4f6df470f38e0fc2c023.gz