patch applied (ghc-6.12/ghc): Set more env variables when configuring libffi

[Ian Lynagh]

Tue May 18 11:50:14 PDT 2010  Ian Lynagh <igloo at earth.li>
  * Set more env variables when configuring libffi
  We now tell it where to find ld, nm and ar

    M ./libffi/ghc.mk +3

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc-6.12/ghc;a=darcs_commitdiff;h=20100518185014-3fd76-a3dec75cfa6454d7283ee7d8673d23e3568a1b43.gz