[rfc] Sort architectures M.R.U.; Was: swap out current when cureating a new architecture

[Andrew Cagney]

> 2002-04-17  Andrew Cagney  <ac131313@redhat.com>
> 
> * gdbarch.sh (gdbarch_update_p): Keep the list of architectures
> 	sorted in most most-recent-used order.  Document.
> 	* gdbarch.h, gdbarch.c: Regenerate.
> 	

I've checked this in.  Now for the interesting bit, use it.

Andrew