Remaining generic bits from sparc64-linux merge

[Jeffrey A Law]

  In message <199710021950.PAA04406@jenolan.rutgers.edu>you write:
  > Thu Oct  2 15:28:24 1997  David S. Miller  <davem@tanya.rutgers.edu>
  > 
  > 	* rtl.c: Remove atol extern, include stdlib.h instead.
  > 	(read_rtx): Use atol/atoq based upon disposition of
  > 	HOST_WIDE_INT.
I just hacked up our autoconf system to determine if a declaration for
atol is needed and changed rtl.c to provide the decl only if it's needed.
So at least the atol part of this patch is no longer needed.

jeff