RFA: Add makefile for cross-configuration torture test

[Joseph S. Myers]

On Wed, 13 Apr 2011, Joern Rennecke wrote:

> This is based on config-list.mk in the pr46489-20101227-branch, but with
> configurations removed that have been recently removed or obsoleted.

On the whole I think the obsolete but not yet removed targets should be 
included in the list with --enable-obsolete, to be removed from it if they 
are actually removed from GCC.  We know that Interix targets are broken, 
but the other obsolete targets might still build.

> This leaves 193 configurations, of which 23 currently appear to be broken
> (according to a test run on gcc20).  These are:

Do these all have issues filed (marked as blocking PR 47093 or 44756 as 
applicable, and with any target maintainer CC:ed)?

-- 
Joseph S. Myers
joseph@codesourcery.com