gdb/testsuite/

gdb/testsuite/
	* gdb.ada/arrayidx.exp: Call get_compiler_info.  New variable old_gcc.
	(print one_two_three, indexes off, print few_reps, indexes off)
	(print many_reps, indexes off, print empty, indexes off)
	(print one_two_three, print few_reps, print many_reps, print empty):
	Call setup_xfail if $gcc_old.