compare_dg_tests.pl: Handle tests that can FAIL but never PASS
The GDB testsuite has a "-nopass" option to the "gdb_test" TCL procedure
which emits a FAIL if the test fails but doesn't emit anything if the test
passes.
This is causing trouble for the CI bisection logic, because if a flaky test
produces a FAIL in a single retry of the testsuite then we don't recognise
its absence in other runs as a kind of PASS.
Suggested-by: Maxim Kuvyrkov <maxim.kuvyrkov@linaro.org>
Change-Id: I8539393424d1f7dbb8eba2b42b5ea94fd321d14e
5 files changed