patch to include gansidecl.h in {ht}config.h

[Jeffrey A Law]

  In message < 199811021734.MAA22887@caip.rutgers.edu >you write:
  > 	This is part 2/2.  It removes redundant includes of
  > gansidecl.h in various other directories besides the gcc dir.
  > 
  > 	I did eh-common.h here because cp/exception.cc depends on
  > coordinating include/!include gansidecl.h with this file. 
  > 
  > 		--Kaveh
  > 
  > Mon Nov  2 11:18:46 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
  > 
  > 	* demangle.h: Don't include gansidecl.h.
  > 	* splay-tree.h: Likewise.
Parts #1 & #2  are both fine once we resolve the outstanding configure.in
issue in the first patch and install the first patch.

jeff