Patch ping^2: RFA: Add makefile for cross-configuration torture test

[Joern Rennecke]

Quoting Joern Rennecke <joern.rennecke@embecosm.com>:

2010-04-14  Joern Rennecke  <joern.rennecke@embecosm.com>

         * config-list.mk: New file.

http://gcc.gnu.org/ml/gcc-patches/2011-04/msg01044.html