libf2c non-null check target

[Jeffrey A Law]

  In message < rzqzpjpvmf2.fsf@djlvig.dl.ac.uk >you write:
  > I was supposed to provide this vaguely-useful libf2c check target;
  > added some dependencies for such work too.
  > 
  > 1998-02-17  Dave Love  <d.love@dl.ac.uk>
  > 
  > 	* libU77/u77-test.f: Tweak some o/p.
  > 
  > 	* libU77/Makefile.in (check): Use -L for new directory structure.
  > 
  > 	* Makefile.in (check): Run the u77 check.
  > 	(config.status,	Makefile): New targets.
Thanks!  Installed.

jeff