test_output.sh: add tests for srunner_print()
test_output.sh: add tests for srunner_print()

There were no tests for srunner_print(). These tests, when run
with the STDOUT_DUMP output type, will output the normal
output to stdout, then call
   srunner_print()
on each output type, dumping that to stdout.

tarruda/check,tarruda/check,tarruda/check,tarruda/check,tarruda/check