(ch) config-lang.in exeext patchlet

[Jeffrey A Law]

  In message < 199904140531.AAA16686@modi.xraylith.wisc.edu >you write:
  > Yet another trivial patch.
  > 
  > Wed Apr 14 00:27:51 1999  Mumit Khan  <khan@xraylith.wisc.edu>
  > 
  > 	* config-lang.in (compilers): Add exeext.
  > 	(stagestuff): Likewise.
Thanks.  Installed.
jeff