only force symbol lookups with local variables on hppa

[Mark Kettenis]

> From: Mike Frysinger <vapier@gentoo.org>
> Date: Sun, 20 Aug 2006 09:03:06 -0400
> 
> as a follow up to the slow script thread:
> http://sources.redhat.com/ml/gdb/2006-08/msg00099.html
> 
> attached patch will change the behavior so symbols with dollar signs
> in them0 ($) are only looked up when a specific arch says to do so
> (with hppa being the only one at the moment)
> -mike

> 2006-08-20  Mike Frysinger  <vapier@gentoo.org>
> 
> 	* parse.c (write_dollar_variable): Check LOOKUP_DOLLAR_SYMBOLS.
> 	* config/pa/tm-hppa.h [LOOKUP_DOLLAR_SYMBOLS]: Define.

Sorry but, this implementation is not acceptable; we want to get rid
of all the defines in tm.h files (and the files themselves
eventually), not add more :(.

Mark