Hurd bug fix

[Jeffrey A Law]

  In message < 199903052232.XAA00111@delius.kettenis.nl >you write:
  > This fix is necesary for proper `limits.h' generation under the Hurd.
  > 
  > Mark
  > 
  > 
  > Fri Mar  5 22:40:59 1999  Mark Kettenis  <kettenis@gnu.org>
  > 
  > 	* config/t-gnu (SYSTEM_HEADER_DIR): New variable.  Set to
  > 	`/include' in order to find the system's limits.h.
Umm, why doesn't the definition of STANDARD_INCLUDE_DIR in gcc/config/gnu.h
handle this?

gcc/config/gnu.h:
/* Standard include directory.  In GNU, "/usr" is a four-letter word.  */
#undef STANDARD_INCLUDE_DIR
#define STANDARD_INCLUDE_DIR "/include"



jeff