This patch adds a gdb_load_cmd procedure to the test harness.  It's useful to 
have this as a separate component so that a target specific gdb_load procedure 
can be built up.  There are some instances in the testsuite/config directory 
that could be simplified by using this -- I've not done so, because I cannot 
easily test them.

ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::         CodeSourcery
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk