patch applied (ghc): remove empty .SECONDARY target

[Simon Marlow]

Mon Feb 27 02:59:39 PST 2006  Simon Marlow <simonmar at microsoft.com>
  * remove empty .SECONDARY target
  
  This works around a problem with recent versions of GNU make that take
  a long time when all targets are declared intermediate with
  .SECONDARY.  See 
  
    https://savannah.gnu.org/bugs/?func=detailitem&item_id=15584
  
  for discussion of the GNU make issue.

    M ./mk/suffix.mk -4