build-perf-test-wrapper.sh: accept test case failures
Utilize the new return value (2) from oe-build-perf-test. Do not exit
with an error in case some individual tests fail. Even if some tests
fail we still want to complete successfully, that is, display and
archive the results and do cleanup. The individual tests do not depend
on each other anymore so test failures shouldn't affect the results of
successful tests.
Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
