patch applied (ghc): Fix parallel make for libffi.

Fri May 1 07:09:31 EDT 2009

Thu Apr 30 06:56:37 PDT 2009  Duncan Coutts <duncan at well-typed.com>
  * Fix parallel make for libffi.
  I didn't realise make can invoke the same action multiple
  times in parallel if the rule has multiple targets. So go
  back to using a build stamp file.

    M ./libffi/ghc.mk -10 +6

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20090430135637-b0bbe-687a26e1f0a1f11de67de7fea42b649608cf411f.gz